southwestradio-site/layouts/partials/nav.html

<aside class="block">
    <ul id="nav">
        {{ $currentPage := . }}
        {{ range .Site.Menus.main }}
        {{ if .HasChildren }}
        <p>
            <a href="#">
                {{ .Pre }}
                <span>{{ .Name }}</span>
            </a>
        </p>
        <ul class="sub-menu">
            {{ range .Children }}
            <li class="{{ if $currentPage.IsMenuCurrent " main" . }}active{{ end }}">
                <a href="{{ .URL }}">{{ .Name }}</a>
            </li>
            {{ end }}
        </ul>
        {{ else }}
        <li class="menu-item">
            <a href="{{ .URL }}">{{ .Name }}</a>
        </li>
        {{ end }}
        {{ end }}
    </ul>
</aside>