Showing the user name in navigation bar using PHP and MySQL

I want to show the username or the user type(student/faculty/admin) in the navigation bar beside 'Home','Contact','About' links. This button or link will have a drop down menu, which further links out to the function that user is permitted. Like: Student -Upload Image -Update Information -Share Views -Check Attendance

whereas the admin panel will be like: Admin -Fill Attendance -Update Data of student -New Student

like this. I am using Php as front end and MySQL in back end, the doing this on XAMPP.