cosin-website/themes/cosin-theme/layouts/partials/site-menu.html

<nav>
  <div id="menu">
    <div>
      <ul>
        {{ range .Site.Menus.main }}
        <li>
          <a href="{{ .URL }}" title="{{ .Name }}">
            {{ .Name }}
          </a>
        </li>
        {{ end }}
      </ul>
    </div>
  </div>
</nav>