求一个完整的无限分类的树形类,,,

回复讨论(解决方案)

http://blog.chinaunix.net/uid-18962755-id-2808388.html
http://www.2cto.com/kf/201009/73581.html
http://www.oschina.net/code/snippet_99943_1452
http://cache.baiducontent.com/c?m=9d78d513d9811bed4fede5697c65c0121c43f6662ba7d6013894cd47c9221d03506790a63a675541c4c50b6402ac1800fdf0412e60453df5c18adf0ac0f9c86a328e2635711a914165895ff0&p=8b2a971a91831aff57ee95794e57a5&newp=986dc91d9d904ead08e2977f0a52cc231610db2151dcd7&user=baidu&fm=sc&query=php+%98%E4%A0%EE&qid=&p1=4

无限极分类树，度娘下，不是很多