<li class="menu-item">

  <a href="#sitemap" data-color="light" data-open="#departments-overlay" data-pos="dropdown">
    Departments
  </a>

  <div id="departments-overlay" class="mfp-hide container">
  		<ul class="nav nav-vertical nav-uppercase tabs">
			
				<li class="description_tab active">
					<a href="#tab-description">Description</a>
				</li>

			
				<li class="additional_information_tab">
					<a href="#tab-additional_information">Additional Information</a>
				</li>

			
				<li class="reviews_tab">
					<a href="#tab-reviews">Reviews (3)</a>
				</li>

		</ul>
		<div class="tab-panels">
			<div id="tab-description" class="panel"></div>
			<div class="panel"></div>
			<div class="panel"></div>
		</div><!-- .tab-panels -->
  </div>
</li>