将内部数组值移动到父数组，重置键并将键名更改为字符串

I have an array as such:

我有一个数组：

[0] => Array
    (
        [0] => 1
        [1] => 30
        [2] => 33
    )

[1] => Array
    (
        [id] => 5
    )
[0] => Arr