Jquery的treeview很好用，如果是简单的树形菜单按照下面的源码实例模仿就可以。
jQuery treeview jQuery Treeview Plugin Demo
PagecodeOther demos
- Large Tree Demo
- Prerendered Large Tree Demo
- Async Tree Demo
- Editable Tree Demo
- Simple Tree Demo, famfamfam theme (no lines)
Sample 1 - default
- Folder 1
- Item 1.1
- Folder 2
- Subfolder 2.1
- File 2.1.1
- File 2.1.2
- File 2.2
- Folder 3 (closed at start)
- File 3.1
- File 4
Sample 2 - Navigation
Sample 3 - fast animations, all branches collapsed at first, red theme, cookie-based persistance
- Item 1
- Item 1.0
- Item 1.0.0
- Item 1.1
- Item 1.2
- Item 1.2.0
- Item 1.2.0.0
- Item 1.2.0.1
- Item 1.2.0.2
- Item 1.2.1
- Item 1.2.1.0
- Item 1.2.2
- Item 1.2.2.0
- Item 1.2.2.1
- Item 1.2.2.2
- Item 2
- Item 2.0
- Item 2.0.0
- Item 2.0.0.0
- Item 2.0.0.1
- Item 2.1
- Item 2.1.0
- Item 2.1.0.0
- Item 2.1.1
- Item 2.1.1.0
- Item 2.1.1.1
- Item 2.1.1.2
- Item 2.1.2
- Item 2.1.2.0
- Item 2.1.2.1
- Item 2.1.2.2
- Item 3
- Item 3.0
- Item 3.0.0
- Item 3.0.1
- Item 3.0.1.0
- Item 3.0.1.1
- Item 3.0.2
- Item 3.0.2.0
- Item 3.0.2.1
- Item 3.0.2.2
Sample 4 - two trees with one tree control, black and gray theme, cookie-based persistance
- Item 1
- Item 2
- Item 2.1
- Item 2.1.1
- Item 2.1.2
- Item 2.2
- Item 2.3 (closed at start)
- Item 2.3.1
- Item 2.3.2
- Item 1
- Item 2
- Item 2.1 (closed at start)
- Item 2.1.1
- Item 2.1.2
- Item 2.2.1
- Item 2.2.2
- Item 2.2.3
- Item 2.2.4
- Item 2.2.5
- Item 2.2.6
- Item 2.2.7
- Item 2.2.8
- Item 2.3
- Item 2.3.1
- Item 2.3.2
- Item 2.3.3
- Item 2.3.4
- Item 2.3.5
- Item 2.3.6
- Item 2.3.7
- Item 2.3.8
- Item 2.3.9
- Item 2.4
- Item 2.4.1
- Item 2.4.2
- Item 2.4.3
- Item 2.4.4
- Item 2.4.5
- Item 2.4.6
- Item 2.4.7
- Item 2.4.8
- Item 2.4.9
- Item 3
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根据树形菜单实现动态div链接实例，关于实现树形菜单请参照上文内容。