'int', 'name' => 'string', ]; public static function init_table() { $result = db_query('CREATE TABLE ' . static::$table_name . ' ( id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(255) NOT NULL );'); return $result; } public static function get_cat_values() { $cat_list = self::filter(array()); $result = array(); foreach($cat_list as $cat) { $result[] = [ $cat->get_id(), $cat->field_name ]; } return $result; } }