<aside class="main-sidebar">
    <!-- sidebar: style can be found in sidebar.less -->
    <section class="sidebar">
      <!-- Sidebar user panel --> 
      <div class="user-panel">
        <div class="pull-left image">
          <img src="images/profile.jpg" class="img-circle" alt="User Image">
        </div>
        <div class="pull-left info">
          <p><?php echo $user['firstname'].' '.$user['lastname']; ?></p>
          <a><i class="fa fa-circle text-success"></i> Online</a>
        </div>
      </div>
      <!-- sidebar menu: : style can be found in sidebar.less -->
      <ul class="sidebar-menu" data-widget="tree">
        <li class="header">HOME</li>
        <li class=""><a href="home.php"><i class="fa fa-dashboard"></i> <span>Dashboard</span></a></li>
        <li class="header">MANAGE</li>
        <li><a href="users.php"><i class="fa fa-calendar"></i> <span>Users</span></a></li>
        <li><a href="today_active_users_list.php"><i class="fa fa-calendar"></i> <span>Today Active Users</span></a></li>
        <li><a href="course_list.php"><i class="fa fa-calendar"></i> <span>Course Lists</span></a></li>
        <li><a href="material_list.php"><i class="fa fa-calendar"></i> <span>Material Lists</span></a></li>
        <li><a href="tracking_list.php"><i class="fa fa-calendar"></i> <span>Tracking</span></a></li>
        <li><a href="assign_materials.php"><i class="fa fa-calendar"></i> <span>Assign Materials</span></a></li>
         <li><a href="black_list_app.php"><i class="fa fa-calendar"></i> <span>Black List Apps</span></a></li>
        
      </ul>
    </section>
    <!-- /.sidebar -->
  </aside>