Форум

<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();?>
<?$rsSections = CIBlockElement::GetElementGroups($arResult['ID'], true);
while($arSection = $rsSections->Fetch())
    $arSections[] = $arSection["CODE"];
if(!in_array($arParams['SECTION_CODE'], $arSections)){
    CHTTP::SetStatus("404 Not Found");
    @define("ERROR_404", "Y");
}?> 

AddEventHandler('main','OnEpilog','_Check404Error', 1);
function _Check404Error()
{
   if (defined('ERROR_404') && ERROR_404=='Y'&& !defined('ADMIN_SECTION'))
   {
      GLOBAL $APPLICATION;
      $APPLICATION->RestartBuffer();
      include   $_SERVER['DOCUMENT_ROOT'].'/bitrix/templates/'.SITE_TEMPLATE_ID.'/header.php';
      require   ($_SERVER['DOCUMENT_ROOT'].'/404.php');
      include   $_SERVER['DOCUMENT_ROOT'].'/bitrix/templates/'.SITE_TEMPLATE_ID.'/footer.php';
   }
} 

foreach ($arResult["ITEMS"] as $cell => $arElement) {
    $arElementId[] = $arElement["ID"];
}

$CIBlockResult = CIBlockElement::GetList(
    Array("SORT"=>"ASC"),
    Array("ID" => $arElementId)
);
while ($arElement = $CIBlockResult->GetNext()) {
    $arResult["RIGHT_DETAIL_URL"][$arElement["ID"]] = $arElement["DETAIL_PAGE_URL"];
}

<? foreach ($arResult["ITEMS"] as $cell => $arElement): ?>
<a href="<?= $arResult["RIGHT_DETAIL_URL"][$arElement["ID"]] ?>" title="<?= $arElement["NAME"] ?>" ><?= $arElement["NAME"] ?></a>
<? endforeach; ?> 

foreach ($arResult["ITEMS"] as $cell => $arElement):
$res = CIBlockElement::GetByID($arElement["ID"]);
if($ar_res = $res->GetNext())
$arResult["ITEMS"][$cell]["DETAIL_PAGE_URL"] = $ar_res["DETAIL_PAGE_URL"];
endforeach; 

["DETAIL_PAGE_URL"]