数组的Php连接

我有下一个数组($columsData):

Array
(
    [avatar] => Array
        (
            [title] => Avatar
            [sort] => 
            [no_html_escape] => 1
        )
    [title] => Array
        (
            [title] => Title
            [sort] => 
        )
)

我怎样才能把这个数组做成这样:

Array
(
    [id] => Array
        (
            [title] => Id
            [no_html_escape] => 1
        )
    [avatar] => Array
        (
            [title] => Avatar
            [no_html_escape] => 1
        )
    [title] => Array
        (
            [title] => Title
            [no_html_escape] => 1
        )
)

非常感谢。