Category system for Tutorial Website

Hi, I've a website which will display tutorials, for Plateform (Mac - PC) , OS (Xp , 7 , MacOsx..., Ubuntu , Centos etc..etc..) Language (French , English etc...) So I want an admin panel (To create tutorials - create categories) and an user table (To display tutorials, filter categories (Multiple) , order by asc-desc and other features.) The main idea for admin is : Create categories, Create Tutorials, Link Multiple Categories to an existing tutorial. The main idea for users is : Display tutorials , Filter tutorials (Ex : French & English , Mac , PC, Xp & 7 & Vista) I've already an user table to display tutorials from a database , order by categories Asc-desc. This can be deleted and replaced by yours. Please post your idea on how the system will work and your price. Do not post premade text.