I need a drop down or similar multi category search extension. I tried SobiPro and Sobi2 but that is not what I am looking for. AdsManager does good work but someone shall modify it. What I exactly want is classifieds search module used in www.sahibinden.com. If you check this website the left column of this site is what I am looking for. I can accept something different but meet my requirements. Anyone who can modify SobiPro or AdsManager to work like this site is wellcomed.