project-manager/doc/include/menu.html

<ul>
    <li>
        Main
        <ul>
            <li><a href="javascript:page('content/main/install.md')">Installation</a></li>
            <li><a href="javascript:page('content/main/commando-reference.md')">Commando Reference</a></li>
            <li><a href="javascript:page('content/main/create-project.md')">Create Project</a></li>
        </ul>
    </li>
</ul>