Сортировка Битрикс

В section.php добавляем:
<?if ($_GET["sort"] == "name" || 
$_GET["sort"] == "catalog_PRICE_3" || 
$_GET["sort"] == "property_PRODUCT_TYPE" || 
$_GET["sort"] == "timestamp_x"){ 
$arParams["ELEMENT_SORT_FIELD"] = $_GET["sort"]; 
$arParams["ELEMENT_SORT_ORDER"] = $_GET["method"]; 
}else{}?>
В template.php:
<p>Сортировать по: 

<a <?if ($_GET["sort"] == "name"):?> class="actived" <?endif;?> href="<?=$arResult["SECTION_PAGE_URL"]?>?sort=name&method=asc"> 
Названию 
</a> 

<a <?if ($_GET["sort"] == "catalog_PRICE_3"):?> class="actived" <?endif;?> href="<?=$arResult["SECTION_PAGE_URL"]?>?sort=catalog_PRICE_3&method=asc"> 
Цене 
</a> 

<a <?if ($_GET["sort"] == "timestamp_x"):?> class="actived" <?endif;?> href="<?=$arResult["SECTION_PAGE_URL"]?>?sort=timestamp_x&method=desc"> 
Новые поступления 
</a>