Форум

AddEventHandler("sale", "OnSaleCalculateOrderDiscount", "Check_basket_discount_rules"); 
function Check_basket_discount_rules(&$arOrder) {
    foreach ($arOrder["BASKET_ITEMS"] as &$arItem) {
        foreach ($arOrder["DISCOUNT_LIST"] as $discRuleKey => $arDiscountRule) {
            foreach ($arDiscountRule["RESULT"]["BASKET"] as $discItemKey => $arDiscountItem) {
                if ($arItem["ID"] == $arDiscountItem["BASKET_ID"]) {
                    $arItem["ACTUAL_DISCOUNT_NAME"] = $arDiscountRule["NAME"];
                }
            }
        }
    }
    return;
}