static function get_categoryII() {        return array(            array(‘id‘ => 1, ‘c1id‘ => 1, ‘name‘ => ‘1aaaa‘),            array(‘id‘ => 2, ‘c1id‘ => 1, ‘name‘ => ‘1bbb‘),            array(‘id‘ => 3, ‘c1id‘ => 2, ‘name‘ => ‘1bbbb‘),            array(‘id‘ => 4, ‘c1id‘ => 3, ‘name‘ => ‘1cccccc‘),        );    }    function mytest() {        $res = self::get_categoryII();        $catid = 2;        $r = array_filter($res, function($t) use ($catid) {            return $t[‘c1id‘] == $catid;        });        dump($r);    }