Сортировка контента в типе поля "родитель" (Связи)

 
// показывает поле в записи :: 
    public function parse($value){
 
        if (!$value){
            return '';
        }
 
        if ($this->getOption('item_style', 'ctype_list') == 'links_list') {
            return $this->parseTeaser($value);
        }
 
		if (!$this->parent_ctype_name) { return false; }
 
		if (empty($this->item['id'])) { return false; }
 
        $controller = cmsCore::getController('content', $this->request);
 
		$content_model = cmsCore::getModel('content');
 
		$ctypes = $controller->model->getContentTypes();
 
		$parent_ctype = $child_ctype = false;
 
		foreach($ctypes as $ctype){
			if ($ctype['name'] == $this->parent_ctype_name){
				$parent_ctype = $ctype;
			}
			if ($ctype['name'] == $this->item['ctype_name']){
				$child_ctype = $ctype;
			}
		}
 
		if (!$parent_ctype) { return false; }
 
		if (!$child_ctype) {
            if (cmsController::enabled($this->item['ctype_name'])){
                $child_ctype = array(
                    'name'       => $this->item['ctype_name'],
                    'controller' => $this->item['ctype_name'],
                    'id'         => null
                );
            } else {
                return false;
            }
        } else {
            $child_ctype['controller'] = 'content';
        }
 
        $filter =  "r.parent_ctype_id = {$parent_ctype['id']} AND ".
                   "r.child_item_id = {$this->item['id']} AND ".
                   'r.child_ctype_id '.($child_ctype['id'] ? '='.$child_ctype['id'] : 'IS NULL' ).' AND '.
                   "r.parent_item_id = i.id AND r.target_controller = '{$child_ctype['controller']}'";
 
        $controller->model->join('content_relations_bind', 'r', $filter);
        $controller->model->limit(false);
 
        $controller->setListContext('form_field');
 
        $parent_ctype['options']['limit'] = 0;
		$controller->model->orderBy('title'); // Сортировка по заголовку (в записи item)
 
        return $controller->renderItemsList($parent_ctype, '', true);
    }