need linkmarket alike PHP script

Need to develop a site with similar features to [login to view URL], with both frontend and amin features. It would be very helpful if you already have done such script, please provide an access to your demo site if possible. General requirement: 1. complete all the features provided by linkmarket, with search engine friendly URL, allow admin to set google adsense in admin area, 2. clean and easy to maintain code, provide database document, use template to define the page layout, try to seperate code logic from user interface 3. allow multi level categories, create initial category records, crawl from top 3 levels from [login to view URL], and also