Firstly, you need to add check for user type logged in the application.
NOW let us assume UserType = 1 for Admin and rest if for non-admin.
Now by default set the visibility/Display to false/none for the menu item you wanted to show to the admin only. Now at login check the user type.
if(UserType == 1)
{
// Show the admin menu type by setting visibility/Display to true/block
}
Thus you can control the menu for usertype based applications. Do this coding on the page(usually masterpage) where you have menu html.