How to implement a Chained menu in PHP?

I want to have a AJAX Function of implementing a chained menu + a result table.

What i need to do:

Firstly, the page populate automatically a vertical menu from MySQL and a result table.

Secondly, when i click an item in the menu, it displays a submenu in a fixed area in the page and a new result table.

Thirdly, when i click an item in the submenu, it displays a sub-submenu in another fixed area in this page and a new result table.

Last, when i click an item in the sub-submenu, it displays a result tab开发者_StackOverflow中文版le.

All the result tables are in the same position. It changes depending on the click in the menus.

I'm lost in how to do that. Do you any ideas about how to implement this? Thanks so much.

Edit:

The effect is a little like this: effect

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Your First, Second, Third, Last very much looks like visualjquery.com

I believe it is written in Javascript+jQuery, so you could learn from its source.