themes/docsy/layouts/partials/sidebar-recurse.html

<ul class="">
    {{ range .catalog }}

    <li>
        {{if .catalog}}

            {{if .path}}
            <div ><a href="{{ .path }}">{{ .name }}</a></div>

            {{else}}
            <div >{{ .name }}</div>
            {{end}}

            {{ partial "sidebar-recurse.html" . }}
        {{else}}
            <a href="{{ .path }}">{{ .name }}</a>
        {{end}}
    </li>

    {{ end }}
</ul>