Bootostrap Toggle button seems to refuse working with php

        <div class="article_02 dept-list" style=" max-height:600px; overflow:auto">
        <div style="width:92%; height:auto; padding:10px 4%; color:#FFF" align="left" class="font_palatino_bold department_header">
            DEPARTMENTS
        </div>
        <?php
            while($row = $run->fetch(PDO::FETCH_OBJ))
            {
                $dept = $row->departments;
                $count = $project->projectCount(array('dbh' => $dbh , 'department' => $dept));

                if(strlen($dept) >30)
                {
                    $dept_display = substr($dept , 0,30) . ' ...' ;
                }
                else
                {
                    $dept_display = $dept;
                }
    ?>
        <a href="department.php?department=<?php print urlencode( $dept ) ?>">
        <div class="departments font_palatino_bold dept-menu" style="font-size:13px; text-transform:capitalize;">
            <?php print strtolower($dept_display) ?> <span class="badge"> <?php print $count ?> </span>
        </div>
        </a>
        <?php
        }
}
catch(PDOException $e)
{
    print $e->getMessage() . "*0";
}       ?>
</div>
<div class="dept-list-mobile">
        <div style="width:100%; height:auto; padding:10px 0; background:#0F71BA; font-family:Verdana; color:#fff;" onclick="toggleDept()">
        <span style="margin-left:10px;"> Select Department  </span>
        <i class="fa-chevron-down fa" style="float:right; margin-right:10px; cursor:pointer"></i>
    </div>
        <div style="width:100%; background:#fff; height:400px; overflow:auto; display:none" id="dept-sub-list-mobile">
        <?php
            while($row = $run2->fetch(PDO::FETCH_OBJ))
            {
                $dept = $row->departments;
                $count = $project->projectCount(array('dbh' => $dbh , 'department' => $dept));

                if(strlen($dept) >30)
                {
                    $dept_display = substr($dept , 0,30) . ' ...' ;
                }
                else
                {
                    $dept_display = $dept;
                }
            ?>
        <a href="department.php?department=<?php print urlencode( $dept ) ?>">
        <div class="departments font_palatino_bold dept-menu" style="font-size:13px; text-transform:capitalize;">
            <?php print strtolower($dept_display) ?> <span class="badge"> <?php print $count ?> </span>
        </div>
        </a>
        <?php
        }
        ?>
    </div>
</div>