Фильтрация каталога по id

<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die(); //print_r($arResult);?> <fo rm name="<?echo $arResult["FILTER_NAME"]."_form"?>" action="<?=SITE_DIR?>kommercheskaya_nedvizhimost/index.php" method="get">   <?foreach($arResult["ITEMS"] as $arItem):       if(array_key_exists("HIDDEN", $arItem)):          echo $arItem["INPUT"];       endif;   endforeach;?>   <?   if (strlen($_REQUEST["set_filter"])>0)        $arrPFV = $_REQUEST[$arResult['FILTER_NAME']."_pf"];     elseif ($arParams["SAVE_IN_SESSION"])        $arrPFV = $_SESSION[$arResult['FILTER_NAME']."arrPFV"];                   $i = 0;   $items = array();    foreach($arResult["arrProp"] as $arProp)    {       $item  = $arResult["ITEMS"][$i];       $item["arrProp"]   = $arProp;       if($arProp["PROPERTY_TYPE"] == "N")             $item["INPUT"] = 'от&nbsp;<input type="text" on keypress="return check_key(event)" name="'.$arResult['FILTER_NAME'].'_pf['.$arProp["CODE"].'][LEFT]" value="'.$arrPFV[$arProp["CODE"]]["LEFT"].'" />'.             ' до&nbsp;<input type="text" on keypress="return check_key(event)" name="'.$arResult['FILTER_NAME'].'_pf['.$arProp["CODE"].'][RIGHT]" value="'.$arrPFV[$arProp["CODE"]]["RIGHT"].'" />';       $i++;      $items[$arProp["CODE"]] = $item;   }?>  <table class="flat" alight="center">        <tr>            <td style="padding-left:10px;">Площадь (м&sup2;)</td>    </tr>    <tr>             <td style="padding-left:10px;" class="inp_filter_price"><?=$items["_plowad"]["INPUT"]?></td>         </tr>        <tr>            <td style="padding-left:15px;" colspan="2"> <input type="s ubmit" name="set_filter" value="НАЙТИ!" class="sendsubmit but-filter-gl act link"/></td>    </tr>  </table>  </form> 

<?=$arItem["ID"]?>