function action(){
		parent::action();
		$this->ifFetCategoryName($this->arrForm["category_id"]);
	}
	function ifFetCategoryName($category_id = NULL){
		$objQuery =& SC_Query_Ex::getSingletonInstance();
		if($this->arrForm["category_id"] and preg_match('/^[0-9]+$/',$this->arrForm["category_id"])){
			$query = '
			SELECT
				category_name
			FROM
				(SELECT
					parent_category_id
				FROM
					dtb_category
				WHERE
					category_id = ?
				LIMIT 1
					) c INNER JOIN
				dtb_category c2 ON( c.parent_category_id = c2.category_id)
			';
			
			$this->arrParentCategoryName = $objQuery->getOne($query,array($category_id));
		}
	}

<!--{$arrParentCategoryName}-->