smarty遍历多维数组有关问题

Array

(

    [0] => Array

        (

            [0] => 1

            [id] => 1

            [1] => 设置

            [name] => 设置

            [2] => 0

            [parentid] => 0

            [child] => Array

                (

                    [0] => Array

                        (

                            [0] => 20

                            [id] => 20

                            [1] => 管理员管理

                            [name] => 管理员管理

                            [2] => 1

                            [parentid] => 1

                            [child] => Array

                                (

                                    [0] => Array

                                        (

                                            [0] => 23

                                            [id] => 23

                                            [1] => 角色管理

                                            [name] => 角色管理

                                            [2] => 20

                                            [parentid] => 20

                                        )



                                    [1] => Array

                                        (

                                            [0] => 22