Как отключить определенное поле для редактирования? icms2+

cmsEventsManager::hook("content_{$ctype['name']}_form", array($form, $item))

[structure:cmsForm:private] => Array

cmsForm Object
(
    [is_tabbed] => 
    [params:cmsForm:private] => Array
        (
        )
 
    [structure:cmsForm:private] => Array
        ( ........... 

 
		$fields = $form->getStructure();
   		foreach($fields as $fieldset_id => $fieldset){ /* тут творим чего хотим*/  } 
   		$form->setStructure($fields);