将查询出的数据进行替换,转换

public $nav = [1 => '主导航', 2 => '侧导航', 3 => '底部导航'];
 
public function translat($arr)
    {
        $new_arr = [];
        if (count($arr) == count($arr, 1)) {
            $arr->navtype = $this->nav[$arr->navtype];
            $new_arr = $arr;
        } else {
            foreach ($arr as $val) {
                $val->navtype = $this->nav[$val->navtype];
                $new_arr[] = $val;
            }
        }
        return $new_arr;
    }

要学会多去用数组解决问题,在循环中foreach的速度是最快的,中间是for,switch是最慢的