[web2py] how to create the left sidebar menu, like in web2py plugins ?

[Stef Mientki]

 hello,

I wonder how to create the left sidebar menu, as shown in web2py plugins
(http://web2py.com/plugins/default/sortable) ?

I couldn't find anything direct related in the web2py and google gave me a lot 
irrelevant links.

thanks,
Stef Mientki