i use bootstrap 3 and i try to display a button group with a submenu. i use bootstrap-submenu
i created the menu
<div class="btn-group">
        <button class="btn btn-primary" type="button">Actions</button>
        <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown" data-submenu="" aria-expanded="false">
            <span class="caret"></span>
        </button>
        <ul class="dropdown-menu dropdown-menu-right">
            <li><a tabindex="0">Annuler</a></li>
            <li><a tabindex="0">Sauvegarder</a></li>
            <li class="divider"></li>
            <li class="dropdown-submenu">
                <a tabindex="0">Payer</a>
                <ul class="dropdown-menu">
                  <li><a tabindex="0">Comptant</a></li>
                  <li><a tabindex="0">Débit</a></li>
                  <li><a tabindex="0">Carte de crédit</a></li>
                  <li><a tabindex="0">Carte cadeaux</a></li>
                  <li><a tabindex="0">Chèque</a></li>
                </ul>
            </li>
        </ul>
    </div>
</div>
that work fine.
but when i try to add something under it, i don't see all the menu http://jsfiddle.net/hxnznnz6/
it's seem like something block it to display completly the menu.
Also if you compare the layout of the two button, it's different
Edit i removed the first btn-group like @Eduardo Arruda Pimentel said.
look ok, but the sub menu of Payer is not displayed when i click on it
New result http://jsfiddle.net/wn9u5z28/

 
     
    