Форум

   class Ingredient
   {
       // инициализация пользовательского свойства для инфоблока
      function GetIBlockPropertyDescription()
          {
           return array(
                  "PROPERTY_TYPE" => "E",
                  "USER_TYPE" => "ingredient",
                  "DESCRIPTION" => "Ингредиент",
                  'GetPropertyFieldHtml' => array('Ingredient', 'GetPropertyFieldHtml'),
                  "ConvertToDB" => array("Ingredient","ConvertToDB"),
                  "ConvertFromDB" => array("Ingredient","ConvertFromDB"),
           );
          }
      function GetPropertyFieldHtml($arProperty, $value, $strHTMLControlName)
         {
            $value["DESCRIPTION"]=unserialize($value["DESCRIPTION"]);
            $arItem = Array(
                  "ID" => 0,
                  "IBLOCK_ID" => 0,
                  "NAME" => ""
            );
            if(intval($value["VALUE"]) > 0)
            {
                  $arFilter = Array(
                        "ID" => intval($value["VALUE"]),
                        "IBLOCK_ID" => $arProperty["LINK_IBLOCK_ID"],
                  );
                  $rsItem = CIBlockElement::GetList(Array(), $arFilter, false, false, Array("ID", "IBLOCK_ID", "NAME"));
                  $arItem = $rsItem->GetNext();
            }
            $html.=
                  'Выберите ингредиент: <input name="'.$strHTMLControlName["VALUE"].'" id="'.$strHTMLControlName["VALUE"].'" value="'.htmlspecialcharsex($value["VALUE"]).'" size="5" type="text">'.
                  ' <span id="sp_'.md5($strHTMLControlName["VALUE"]).'_'.$key.'" >'.$arItem["NAME"].'</span>'.
                  '<input type="button" value="Выбрать" onCl ick="jsUtils.OpenWindow(\'/bitrix/admin/iblock_element_search.php?lang='.LANG.'&IBLOCK_ID='.$arProperty["LINK_IBLOCK_ID"].'&n='.$strHTMLControlName["VALUE"].'\', 600, 500);">'.
                  ' Единица измерения:<input type="text" id="meas" name="'.$strHTMLControlName["DESCRIPTION"].'[0]" value="'.htmlspecialcharsex($value["DESCRIPTION"][0]).'" />'.
                  ' Количество:<input type="text" id="quan" name="'.$strHTMLControlName["DESCRIPTION"].'[1]" value="'.htmlspecialcharsex($value["DESCRIPTION"][1]).'" />'
                              
                  ;

            return  $html;
               
         }      
      function GetAdminListViewHTML($arProperty, $value, $strHTMLControlName)
         {
            return;
         }
      function ConvertToDB($arProperty, $value) // сохранение в базу
         {
            $return = false;
            if(is_array($value)&& array_key_exists("VALUE", $value))
               {
                  $return = array("VALUE" => serialize($value["VALUE"]));
               }
            if(is_array($value)&& array_key_exists("DESCRIPTION", $value)) $return["DESCRIPTION"]=serialize($value["DESCRIPTION"]);
            return $return; 
         }
      function ConvertFromDB($arProperty, $value) //извлечение из БД
         {
            $return = false;
            if(!is_array($value["VALUE"]))
               {
                  $return = array("VALUE" => unserialize($value["VALUE"]));
               }
            return $return;
         }

   }

AddEventHandler('iblock', 'OnIBlockPropertyBuildList', array('Ingredient', 'GetIBlockPropertyDescription'));

//в шаблоне
$prop['DESCRIPTION'] = json_decode(htmlspecialcharsBack($prop["DESCRIPTION"]));
//OR
$prop['~DESCRIPTION'] = json_decode($prop["~DESCRIPTION"]);

CIBlockElement::SetPropertyValueCode($el['ID'], $ib['ID'], $arProp)