关于无限分类的数组问题

用无限分类把数据给分类出来的数组,现在怎么用smarty显示出来 麻烦给位大侠帮忙解决下
Array
(
    [0] => Array
        (
            [id] => 1
            [pid] => 0
            [content] => 动物
            [son] => Array
                (
                    [0] => Array
                        (
                            [id] => 6
                            [pid] => 1
                            [content] => 狗
                            [son] => Array
                                (
                                )
                        )
                )
        )
    [1] => Array
        (
            [id] => 2
            [pid] => 0
            [content] => 植物
            [son] => Array
                (
                    [0] => Array
                        (
                            [id] => 3
                            [pid] => 2
                            [content] => 桃树
                            [son] => Array
                                (
                                    [0] => Array
                                        (
                                            [id] => 5
                                            [pid] => 3
                                            [content] => 桃子
                                            [son] => Array
                                                (
                                                )
                                        )
                                )
                        )
                )
        )
    [2] => Array
        (
            [id] => 4
            [pid] => 0
            [content] => 天气
            [son] => Array
                (
                )
        )
)