The missunderstanding was the term “Portfolio Sub Menu” you used. 🙂
A sub menu in a portfolio like in the demo you’re referring to is only done by templates not by categories.(e.g. “Portfolio, Four Columns”) But what you meant are categories on a portfolio page (e.g. “Abstract” or “Animals”).
Good you’re sorted !!
Cheers,
Alexander @ http://www.mouseclick.com