Пример хука на изменение ширины поля формы центра администрирования

class Hostcms_Admin_Form_Observer
{
   /**
    * Изменение ширины поля ID из формы 65
    */
   static public function onBeforeExecute($controller, $args)
   {
      $oAdmin_Form = $controller->getAdminForm();
      if ($oAdmin_Form->id == 65)
      {
         $aAdmin_Form_Fields =  $controller->getAdminFormFields();
         foreach ($aAdmin_Form_Fields as $oAdmin_Form_Field)
         {
            if ($oAdmin_Form_Field->id == 335)
            {
               $oAdmin_Form_Field->width = '110px';
            }
         }
      }
   }
}

Core_Event::attach('Admin_Form_Controller.onBeforeExecute', array('Hostcms_Admin_Form_Observer', 'onBeforeExecute'));