autoload.php

См. документацию.

<?php
 
use Bitrix\Main\Loader;
 
Loader::registerAutoLoadClasses(
    'catalog',
    [
        'catalog' => 'install/index.php',
        'CCatalog' => 'mysql/catalog.php',
        'CCatalogGroup' => 'mysql/cataloggroup.php',
        'CExtra' => 'mysql/extra.php',
        'CPrice' => 'mysql/price.php',
        'CCatalogProduct' => 'mysql/product.php',
        'CCatalogProductGroups' => 'mysql/product_group.php',
        'CCatalogLoad' => 'mysql/catalog_load.php',
        'CCatalogExport' => 'mysql/catalog_export.php',
        'CCatalogImport' => 'mysql/catalog_import.php',
        'CCatalogDiscount' => 'mysql/discount.php',
        'CCatalogDiscountCoupon' => 'mysql/discount_coupon.php',
        'CCatalogVat' => 'mysql/vat.php',
        'CCatalogEvent' => 'general/catalog_event.php',
        'CCatalogSku' => 'general/catalog_sku.php',
        'CCatalogDiscountSave' => 'mysql/discount_save.php',
        'CCatalogStore' => 'mysql/store.php',
        'CCatalogStoreProduct' => 'mysql/store_product.php',
        'CCatalogAdmin' => 'general/admin.php',
        'CGlobalCondCtrl' => 'general/catalog_cond.php',
        'CGlobalCondCtrlComplex' => 'general/catalog_cond.php',
        'CGlobalCondCtrlAtoms' => 'general/catalog_cond.php',
        'CGlobalCondCtrlGroup' => 'general/catalog_cond.php',
        'CGlobalCondTree' => 'general/catalog_cond.php',
        'CCatalogCondCtrl' => 'general/catalog_cond.php',
        'CCatalogCondCtrlComplex' => 'general/catalog_cond.php',
        'CCatalogCondCtrlGroup' => 'general/catalog_cond.php',
        'CCatalogCondCtrlIBlockFields' => 'general/catalog_cond.php',
        'CCatalogCondCtrlIBlockProps' => 'general/catalog_cond.php',
        'CCatalogCondTree' => 'general/catalog_cond.php',
        'CCatalogCondCtrlBasketProductFields' => 'general/sale_cond.php',
        'CCatalogCondCtrlBasketProductProps' => 'general/sale_cond.php',
        'CCatalogCondCtrlCatalogSettings' => 'general/sale_cond.php',
        'CCatalogActionCtrlBasketProductFields' => 'general/sale_act.php',
        'CCatalogActionCtrlBasketProductProps' => 'general/sale_act.php',
        'CCatalogGifterProduct' => 'general/sale_act.php',
        'CCatalogDiscountConvert' => 'general/discount_convert.php',
        'CCatalogDiscountConvertTmp' => 'mysql/discount_convert.php',
        'CCatalogProductProvider' => 'general/product_provider.php',
        'CCatalogStoreBarCode' => 'mysql/store_barcode.php',
        'CCatalogContractor' => 'mysql/contractor.php',
        'CCatalogDocsTypes' => 'general/store_docs_type.php',
        'CCatalogArrivalDocs' => 'general/store_docs_type.php',
        'CCatalogStoreAdjustmentDocs' => 'general/store_docs_type.php',
        'CCatalogMovingDocs' => 'general/store_docs_type.php',
        'CCatalogDeductDocs' => 'general/store_docs_type.php',
        'CCatalogReturnsDocs' => 'general/store_docs_type.php',
        'CCatalogUnReservedDocs' => 'general/store_docs_type.php',
        'CCatalogDocs' => 'mysql/store_docs.php',
        'CCatalogStoreControlUtil' => 'general/store_utility.php',
        'CCatalogStoreDocsElement' => 'mysql/store_docs_element.php',
        'CCatalogStoreDocsBarcode' => 'mysql/store_docs_barcode.php',
        'CCatalogIBlockParameters' => 'general/comp_parameters.php',
        'CCatalogMeasure' => 'mysql/measure.php',
        'CCatalogMeasureResult' => 'mysql/measure.php',
        'CCatalogMeasureClassifier' => 'general/unit_classifier.php',
        'CCatalogMeasureAdminResult' => 'general/measure_result.php',
        'CCatalogMeasureAdminUiResult' => 'general/measure_result.php',
        'CCatalogMeasureRatio' => 'mysql/measure_ratio.php',
        'CCatalogProductSet' => 'mysql/product_set.php',
        'CCatalogAdminTools' => 'general/admin_tools.php',
        'CCatalogAdminProductSetEdit' => 'general/admin_tools.php',
        'CCatalogMenu' => 'general/catalog_menu.php',
        'CCatalogCSVSettings' => 'general/csv_settings.php',
        'CCatalogStepOperations' => 'general/step_operations.php',
        'CCatalogProductSetAvailable' => 'general/step_operations.php',
        'CCatalogProductAvailable' => 'general/step_operations.php',
        'CCatalogIblockReindex' => 'general/step_operations.php',
        'CCatalogProductSettings' => 'general/step_operations.php',
        'CCatalogTools' => 'general/tools.php',
        'CCatalogResult' => 'general/result.php',
        'CProductQueryBuilder' => 'general/querybuilder.php',
 
        '\Bitrix\Catalog\Compatible\EventCompatibility' => 'lib/compatible/eventcompatibility.php',
        '\Bitrix\Catalog\Config\Feature' => 'lib/config/feature.php',
        '\Bitrix\Catalog\Config\State' => 'lib/config/state.php',
        '\Bitrix\Catalog\Discount\DiscountManager' => 'lib/discount/discountmanager.php',
        '\Bitrix\Catalog\Ebay\EbayXMLer' => 'lib/ebay/ebayxmler.php',
        '\Bitrix\Catalog\Ebay\ExportOffer' => 'lib/ebay/exportoffer.php',
        '\Bitrix\Catalog\Ebay\ExportOfferCreator' => 'lib/ebay/exportoffercreator.php',
        '\Bitrix\Catalog\Ebay\ExportOfferSKU' => 'lib/ebay/exportoffersku.php',
        '\Bitrix\Catalog\Grid\Panel\ProductGroupAction' => 'lib/grid/panel/productgroupaction.php',
        '\Bitrix\Catalog\Grid\ProductAction' => 'lib/grid/productaction.php',
        '\Bitrix\Catalog\Helpers\Admin\CatalogEdit' => 'lib/helpers/admin/catalogedit.php',
        '\Bitrix\Catalog\Helpers\Admin\IblockPriceChanger' => 'lib/helpers/admin/iblockpricechanger.php',
        '\Bitrix\Catalog\Helpers\Admin\RoundEdit' => 'lib/helpers/admin/roundedit.php',
        '\Bitrix\Catalog\Helpers\Admin\Tools' => 'lib/helpers/admin/tools.php',
        '\Bitrix\Catalog\Helpers\Tools' => 'lib/helpers/tools.php',
        '\Bitrix\Catalog\Model\Entity' => 'lib/model/entity.php',
        '\Bitrix\Catalog\Model\Event' => 'lib/model/event.php',
        '\Bitrix\Catalog\Model\EventResult' => 'lib/model/eventresult.php',
        '\Bitrix\Catalog\Model\Price' => 'lib/model/price.php',
        '\Bitrix\Catalog\Model\Product' => 'lib/model/product.php',
        '\Bitrix\Catalog\Product\Price\Calculation' => 'lib/product/price/calculation.php',
        '\Bitrix\Catalog\Product\Basket' => 'lib/product/basket.php',
        '\Bitrix\Catalog\Product\CatalogProvider' => 'lib/product/catalogprovider.php',
        '\Bitrix\Catalog\Product\CatalogProviderCompatibility' => 'lib/product/catalogprovidercompatibility.php',
        '\Bitrix\Catalog\Product\Price' => 'lib/product/price.php',
        '\Bitrix\Catalog\Product\PropertyCatalogFeature' => 'lib/product/propertycatalogfeature.php',
        '\Bitrix\Catalog\Product\QuantityControl' => 'lib/product/quantitycontrol.php',
        '\Bitrix\Catalog\Product\Search' => 'lib/product/search.php',
        '\Bitrix\Catalog\Product\Sku' => 'lib/product/sku.php',
        '\Bitrix\Catalog\Product\SubscribeManager' => 'lib/product/subscribemanager.php',
        '\Bitrix\Catalog\Product\SystemField' => 'lib/product/systemfield.php',
        '\Bitrix\Catalog\Product\Viewed' => 'lib/product/viewed.php',
        '\Bitrix\Catalog\Update\AdminFilterOption' => 'lib/update/adminfilteroption.php',
        '\Bitrix\Catalog\Update\AdminGridOption' => 'lib/update/admingridoption.php',
        '\Bitrix\Catalog\Url\AdminPage\CatalogBuilder' => 'lib/url/adminpage/catalogbuilder.php',
        '\Bitrix\Catalog\CatalogIblockTable' => 'lib/catalogiblock.php',
        '\Bitrix\Catalog\CatalogViewedProductTable' => 'lib/catalogviewedproduct.php',
        '\Bitrix\Catalog\DiscountTable' => 'lib/discount.php',
        '\Bitrix\Catalog\DiscountCouponTable' => 'lib/discountcoupon.php',
        '\Bitrix\Catalog\DiscountEntityTable' => 'lib/discountentity.php',
        '\Bitrix\Catalog\DiscountModuleTable' => 'lib/discountmodule.php',
        '\Bitrix\Catalog\DiscountRestrictionTable' => 'lib/discountrestriction.php',
        '\Bitrix\Catalog\ExtraTable' => 'lib/extra.php',
        '\Bitrix\Catalog\GroupTable' => 'lib/group.php',
        '\Bitrix\Catalog\GroupAccessTable' => 'lib/groupaccess.php',
        '\Bitrix\Catalog\GroupLangTable' => 'lib/grouplang.php',
        '\Bitrix\Catalog\MeasureTable' => 'lib/measure.php',
        '\Bitrix\Catalog\MeasureRatioTable' => 'lib/measureratio.php',
        '\Bitrix\Catalog\PriceTable' => 'lib/price.php',
        '\Bitrix\Catalog\ProductTable' => 'lib/product.php',
        '\Bitrix\Catalog\ProductGroupAccessTable' => 'lib/productgroupaccess.php',
        '\Bitrix\Catalog\RoundingTable' => 'lib/rounding.php',
        '\Bitrix\Catalog\StoreTable' => 'lib/store.php',
        '\Bitrix\Catalog\StoreBarcodeTable' => 'lib/storebarcode.php',
        '\Bitrix\Catalog\StoreProductTable' => 'lib/storeproduct.php',
        '\Bitrix\Catalog\VatTable' => 'lib/vat.php',
        //deprecated
        '\Bitrix\Catalog\EbayXMLer' => 'lib/ebay/old.php',
        '\Bitrix\Catalog\ExportOffer' => 'lib/ebay/old.php',
        '\Bitrix\Catalog\ExportOfferCreator' => 'lib/ebay/old.php',
        '\Bitrix\Catalog\ExportOfferSKU' => 'lib/ebay/old.php',
        '\Bitrix\Catalog\SearchHandlers' => 'lib/product/old.php',
    ]
);