<div class="tabbable">
    <ul class="nav nav-tabs" id="modstab">
        <li class="active"><a href="#tab_sys">Sys Mods</a></li>
        <li><a href="#tab_project">Project Mods</a></li>        
    </ul>
    <div class="tab-content">
        <div class="tab-pane active" id="tab_sys">${content_sys}</div>
        <div class="tab-pane" id="tab_project">${content_project}</div>      
    </div>
</div>