I need php script So i can easily add categories and sub-categories. And user can rate mobiles and reviews and compare the features side by side with comparison feature. http://www.gsmarena.com If it isn't possible please tell me which script they are using for mobile site.Because both sites are using same features. http://www.whatmobile.com.pk http://www.hitmobilephone.com/
your best bet is to find a script that is already made and tested. If you get one made for you, it may take you days if not weeks before you start finding bugs. So I suggest you finding a free script that already does what you are looking for and custom few line to fit your needs. Good luck