数组转json 结构的转换

我的数组是array
(
    [1] => array
        (
            [aid] => 1
            [pid] => 0
            [brand] => young
            [id] => 2
            [uname] => young1
            [groups] => 3
            [sub] => array
                (
                    [2] => array
                        (
                            [aid] => 1
                            [pid] => 2
                            [brand] => young
                            [id] => 3
                            [uname] => young2
                            [groups] => 4
                        )

                    [3] => array
                        (
                            [aid] => 1
                            [pid] => 2
                            [brand] => young
                            [id] => 4
                            [uname] => young3
                            [groups] => 4
                        )

                )

        )这样的 
我用json转是这样的

如何把画圈的去掉，因为这样app解析不了

回复讨论(解决方案)

$new_data = array();foreach ($data as $itm) {	$itm['sub'] = array_values($itm['sub']);	$new_data[] = $itm;}