<ul class="menu">  
	{% for nav in site.data.nav %}
	  {% if nav.subcategories != null %}
	    <li class="dropdown">
	      <a href="#">{{ nav.title }}</a>
		<ul class="dropdown-child">
		  {% for subcategory in nav.subcategories %}
		    <li><a href="{{ site.github.url }}{{ subcategory.subhref }}">{{ subcategory.subtitle }}</a></li>
		  {% endfor %}
		</ul>
	    </li>
	{% elsif nav.external-subcategories != null %}
	    <li class="dropdown">
	      <a href="{{ site.url }}{{ nav.url }}">{{ nav.title }}</a>
