ruby on rails - dynamic tree menu using awesome nested set -

How can you create a dynamic tree menu helper using awesome nested sets (or any other set plugin) in Rails? The result should look like this:

  & lt; Div class = "level_0" & gt; & Lt; Span class = "title" & gt; Categroy & lt; / Span & gt; & Lt; Div class = "Level_1 & gt; & lt; span class =" title "& gt; sub-class  
 subcategories sub-subcategory sub-subcategory sub-subcategory sub-subcategory & lt; / Div & gt; & Lt; / Div & gt; & Lt; Div class = "level_1 & gt; span class =" title "& gt; sub-class  
 gt; & lt; span class = "title" & gt; sub-class & lt; / span & gt; & lt; div class = "level_2" & gt; Sub-subcategory Sub-Subcategory Sub-Subcategory Sub-Subcategory Sub-Subcategory / Div & gt; & Lt; / Div & gt; & Lt; / Div & gt;  

I have been able to do something that you describe the following: