调用的函数 get_categories_tree()
    Array
    (
    [16] => Array
    (
    [id] => 16
    [name] => 魅力女人
    [url] => category.php?id=16
    [cat_id] => Array
    (
    [21] => Array
    (
    [id] => 21
    [name] => 补水保湿
    [url] => category.php?id=21
    [cat_id] => Array
    (
    )
    )

    1. [22] => Array<br /> (<br /> [id] => 22<br /> [name] => 美白祛斑<br /> [url] => category.php?id=22<br /> [cat_id] => Array<br /> (<br /> )
    2. )
    3. [23] => Array<br /> (<br /> [id] => 23<br /> [name] => 抗皱紧肤<br /> [url] => category.php?id=23<br /> [cat_id] => Array<br /> (<br /> )<br /> )
    4. [24] => Array<br /> (<br /> [id] => 24<br /> [name] => 减肥瘦身<br /> [url] => category.php?id=24<br /> [cat_id] => Array<br /> (<br /> )
    5. )
    6. [25] => Array<br /> (<br /> [id] => 25<br /> [name] => 丰胸美乳<br /> [url] => category.php?id=25<br /> [cat_id] => Array<br /> (<br /> )<br /> )
    7. [26] => Array<br /> (<br /> [id] => 26<br /> [name] => 延缓衰老<br /> [url] => category.php?id=26<br /> [cat_id] => Array<br /> (<br /> )<br /> )
    8. [27] => Array<br /> (<br /> [id] => 27<br /> [name] => 补血养血<br /> [url] => category.php?id=27<br /> [cat_id] => Array<br /> (<br /> )<br /> )
    9. [28] => Array<br /> (<br /> [id] => 28<br /> [name] => 调内分泌<br /> [url] => category.php?id=28<br /> [cat_id] => Array<br /> (<br /> )<br /> )<br /> )<br /> )<br />)