User Name is correct, i have tried this before, so what you would need is to do it in php, a table for categories, if you having a user system one for users and a table for tutorial. You would need a basic submit page to insert them, and admin panel which accepts them like you would have edit.php thats for admins and then they can accept or reject which updates the field status from 0 to one. then to show all you would have
mysql_query(SELECT * FROM tutorials WHERE status = 1);
That would give all accepted. You would then need to do a select to have links like tutorial.php?id=65 which you $_GET['cat'];, then $cat = $_GET['cat']; and
SELECT * FROM tutorials WHERE id = $cat;
That would get the one which id is 65 if you get me.