<aside class="nav-options">
    <a class="" href="#">
      <img src="images/logo.svg" class="logo-sml" width="120">
    </a> 
    <div class="navbar-collapse" id="navbarSupportedContent">
      <ul>
        <li><a href="attendance.php"><img src="images/nprospect.png"> Attendance</a></li>
        <li><a href="leaves.php" class="active"><img src="images/to-do-list.png"> Leaves</a></li>
        <li><a href="timesheet.php"><img src="images/to-do-list.png"> Timesheet</a></li>
        <li><a href="leaves-request.php"><img src="images/request.png"> Request</a></li>
        <li><a href="regularization.php"><img src="images/request.png"> Regularization </a></li>
        <li><a href="settings.php"><img src="images/nsetting.png"> Settings</a></li>
      </ul>   
    </div>
  </aside>