Hey Marius,
That's what I have done, but I think you are not fully understanding what I want.
As you can see this projects page work with an Isotope: http://anacuba.com/projects/;
The example that I tried even before you told me about it, works with categories, it's totally different.
Do you get now what I mean? Or are you saying that is possible to make a menu like that with process that you told me? cause if so I am missing something! :)
Thank you,