function setup_userdata($user)
{
    global $userdata;
    $userdata = $user;
    if ($userdata != null) {
        $faculty = get_facultydata($user->faculty_id);
        setup_facultydata($faculty);
    }
}
<tfoot>
	<tr>
    <th scope="col" class="column-stt">STT</th>
	<th scope="col" id="cb" class="manage-column column-cb check-column" style=""><input type="checkbox" /></th>
	<th scope="col" id="cname" class="manage-column column-cname" style="">Môn học</th>
	<th scope="col" id="cfaculty" class="manage-column column-cfaculty" style="">Khoa</th>
	<th scope="col" id="ccredit" class="manage-column column-ccredit" style="">Số tín chỉ</th>
    <th scope="col" id="numstudent" class="manage-column column-numstudent" style="">Số sinh viên</th>
    <th scope="col" id="cexpire" class="manage-column column-cexpire" style="">Hạn đăng ký</th>
	</tr>
</tfoot>
<tbody id="the-course-list" class="list:course">
<?php 
foreach ((array) $all_courses as $course) {
    setup_coursedata($course);
    setup_facultydata(get_facultydata(get_course_facultyid()));
    ?>
<tr id="course-<?php 
    course_id();
    ?>
" valign="top"<?php 
    class_alternate();
    ?>
>
<td class="column-stt"><?php 
    echo ++$offset;
    ?>
</td>
<th scope="row" class="check-column"><input type="checkbox" name="delete_courses[]" value="<?php 
    course_id();
    ?>