//$consult 为往里插之前的数组

        //把$arr的元素追加到$consult的最前面

        $arr = [];

        $arr[0]['workplaceId'] = '0';

        $arr[0]['workplaceName'] = '信息部';

        $arr[0]['List'] = [['typeId' => 3, 'typeName' => '全部']];

        array_walk($arr,function($item) use (&$consult) {

            array_unshift($consult, $item);

        });