Thank you Jason,
I followed this tutorial yesterday, but today, since you have suggested to take a look at it, I have been following the tutorial over and over again, trying all day, and I can't get it work, my situation is a little different than this tutorial but I am doing few thing wrong for sure.
Here is an image of my page http://screencast.com/t/7eeK2rEDa (div tags and recordsets).
I can separate the categories easily because is just a repeat selection of the category recordset, here is an image of what I get back from the recordset when I do that http://screencast.com/t/KZIMggxO
Then wen I do a repeat selection of the nested div with the info from the Vendors recordset, I get this http://screencast.com/t/nWtkrzM7jNHk
Any help will be really appreciated.