hugo/docs/layouts/chrome/menu.html

<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
  <!-- Brand and toggle get grouped for better mobile display -->
  <div class="navbar-header">
    <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
      <span class="sr-only">Toggle navigation</span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
    </button>
    <a class="navbar-brand" href="/"><i class="icon-hugo_serif" alt="hugo"></i></a>
  </div>

  <!-- Collect the nav links, forms, and other content for toggling -->
  <div class="collapse navbar-collapse navbar-ex1-collapse">
    <ul class="nav navbar-nav">
      <li class="dropdown">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Getting Started <b class="caret"></b></a>
        <ul class="dropdown-menu">
            {{ range $key, $value := .Site.Indexes.groups.gettingstarted.Pages }}
            <li hugo-nav="{{$value.RelPermalink}}"><a href="{{$value.Permalink}}"> {{ $value.LinkTitle }} </a> </li>
            {{ end }}
        </ul>
      </li>
      <li class="dropdown">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Content <b class="caret"></b></a>
        <ul class="dropdown-menu">
            {{ range $key, $value := .Site.Indexes.groups.content.Pages }}
            <li hugo-nav="{{$value.RelPermalink}}"><a href="{{$value.Permalink}}"> {{ $value.LinkTitle }} </a> </li>
            {{ end }}
        </ul>
      </li>
      <li class="dropdown">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Layout <b class="caret"></b></a>
        <ul class="dropdown-menu">
            {{ range $key, $value := .Site.Indexes.groups.layout.Pages }}
            <li hugo-nav="{{$value.RelPermalink}}"><a href="{{$value.Permalink}}"> {{ $value.LinkTitle }} </a> </li>
            {{ end }}
        </ul>
      </li>
      <li class="dropdown">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Indexes <b class="caret"></b></a>
        <ul class="dropdown-menu">
            {{ range $key, $value := .Site.Indexes.groups.indexes.Pages }}
            <li hugo-nav="{{$value.RelPermalink}}"><a href="{{$value.Permalink}}"> {{ $value.LinkTitle }} </a> </li>
            {{ end }}
        </ul>
      </li>
      <li class="dropdown">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Extras <b class="caret"></b></a>
        <ul class="dropdown-menu">
            {{ range $key, $value := .Site.Indexes.groups.extras.Pages }}
            <li hugo-nav="{{$value.RelPermalink}}"><a href="{{$value.Permalink}}"> {{ $value.LinkTitle }} </a> </li>
            {{ end }}
        </ul>
      </li>
      <li class="dropdown">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Community <b class="caret"></b></a>
        <ul class="dropdown-menu">
            {{ range $key, $value := .Site.Indexes.groups.community.Pages }}
            <li hugo-nav="{{$value.RelPermalink}}"><a href="{{$value.Permalink}}"> {{ $value.LinkTitle }} </a> </li>
            {{ end }}
        </ul>
      </li>
    </ul>
    <ul class="nav navbar-nav navbar-right">
      <li class="dropdown">
        <a href="#" class="dropdown-toggle" data-toggle="dropdown">Meta <b class="caret"></b></a>
        <ul class="dropdown-menu">
            {{ range $key, $value := .Site.Indexes.groups.meta.Pages }}
            <li hugo-nav="{{$value.RelPermalink}}"><a href="{{$value.Permalink}}"> {{ $value.LinkTitle }} </a> </li>
            {{ end }}
        </ul>
      </li>
      <li><a href="http://github.com/spf13/hugo/releases"><i class="icon-arrow-down "> </i></a></li>
      <li><a href="http://github.com/spf13/hugo"><i class="icon-octocat icon-2x"> </i></a></li>
    </ul>
  </div><!-- /.navbar-collapse -->
</nav>