怎么将一个树状数组转换为一个普通的二维数组

如何将一个树状数组转换为一个普通的二维数组
请教如何将一个树状数组转换为一个普通的二维数组 

元素的顺序不要紧~~只要是这个结构就行了

例如
Array
(
    [0] => Array
        (
            [kind_id] => 1103
            [kind_fid] => 1101
            [kind_name] => asdfsadf
            [children] => Array
                (
                    [0] => Array
                        (
                            [kind_id] => 1109
                            [kind_fid] => 1103
                            [kind_name] => testt
                            [children] => Array
                                (
                                )

                        )

                )

        )

    [1] => Array
        (
            [kind_id] => 1104
            [kind_fid] => 1101
            [kind_name] => sdfsdf
            [children] => Array
                (
                    [0] => Array
                        (
                            [kind_id] => 1110
                            [kind_fid] => 1104
                            [kind_name] => test222