deleteThreaded

        /**
         * Deletes tree element with all of his descendants.
         * @return boolean
         * @param array $records Results of find("threaded") query.
         * @param array $recordToDelete id of record to be deleted.
         * @param mixed $model Instance of model or null. When null this object will be used.
         */
        public function deleteAllThreaded($records,$recordToDelete,$model =null)
        {
            $flatArray = array(); 
            if(is_null($model))
            {
                $model = $this;
            }
            $this->toSingleDimmension($flatArray, $records,$model->name);
            $toDelete[] = $recordToDelete;
            $this->findChildren($toDelete,$flatArray,$recordToDelete);
            $model->deleteAll(array("id" => $toDelete));
            
            return true;
        }
        
        /**
         * Makes multidimensional array falt. 
         * Recurrent helper method.
         * @param array $flatArray Destination array.
         * @param array $data Multidimensional array.
         * @param string $model Model name.
         */
        private function toSingleDimmension(&$flatArray, $data, $modelName)
        {    
            foreach($data as $record)
            {                        
                $flatArray[] = $record[$modelName];
                if(!empty($record["children"]))
                {            
                    $this->toSingleDimmension($flatArray, $record["children"],$modelName);
                }
            }
        }
        
    /**
     * Searches all given records to the bottom, for children with given $parentId
     * Recurrent helper method.
     * @param array $toDelete stack for ids of record to be deleted.
     * @param array $records falt array which contains flat array created from results of find("threaded").
     * @param integer $parentId id of parent to search for.
     */
    private function findChildren(&$toDelete,$records,$parentId)
    {
        foreach($records as $record)
        {
            if($record["parent_id"] == $parentId)
            {
                $toDelete[] = $record["id"];
                $this->findChildren($toDelete,$records,$record["id"]);                
            }
        }
    }

        public function deleteTreeElement($data)
        {
            $TemplateMenuItem = $this->getModelObject("TemplateMenuItem");
            $records = $TemplateMenuItem->find("threaded");
            
            $this->deleteAllThreaded($records,$data["elementId"], $TemplateMenuItem);
                       ....
                 }