how can I design the layout of 'Class Reference'

Hi guys:

I want to setup a website to arrange the docs of my department, just like the yii [url="http://www.yiiframework.com/doc/api/"]Class Reference[/url]. 

layouts:

column2

the left is for a portlet, and the right is for the main content.

the left is a CTreeView, is like that?

can I find the source code of yii class reference any where?