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private function getChild($id, $cur_node){
		global $cfg, $database;
		$getChild_query = "SELECT `cat_id` FROM `".$cfg['db_prefix']."cat` WHERE `cat_parent_id` = ".$id;
		foreach ($database->query($getChild_query) as $getChild){
			$cur_node[$id][$getChild['cat_id']] = $this->getChild($getChild['cat_id'], $cur_node[$id]);
		}
		return $cur_node;
		
	}