General help

I'll see your hack of Gustav's hack, and raise it with a datalib function and a CVS checkin. 

    if (isteacher($course->id)) {
        if ($mycourses = get_my_courses($user->id)) {
            $courselisting = '';
            foreach ($mycourses as $mycourse) {
                if ($mycourse->visible) {
                    $courselisting .= "<a href=\"$CFG->wwwroot/course/view.php?id=$mycourse->id\">$mycourse->fullname</a>, ";
                }
            }
            print_row(get_string('courses').':', rtrim($courselisting,', '));
        }
    }