Ho provato questo snippet ma non funziona bene:

http://bootsnipp.com/snippets/featur...pdown-menu-bs3

le scritte dei submenu escono fuori dal tag a o li.

codice HTML:
<!-- Navigation -->
<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div class="container">

<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<a class="navbar-brand" href="index.php">GGG</a>
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Software <b class="caret"></b></a>
    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu">
        <li><a href="#">Software</a></li>
        <li><a href="#">Software</a></li>
        <li class="divider"></li>
        <li class="dropdown-submenu"><a href="#">Software</a>
            <ul class="dropdown-menu">
                <li><a href="#">Software Software</a></li>
                <li><a href="#">Software Software</a></li>
                <li><a href="#">Software Software</a></li>
                <li><a href="#">Software Software</a></li>
                <li><a href="#">Software Software</a></li>
            </ul>
        </li>
    </ul>
</li>
<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">Software <b class="caret"></b></a>
    <ul class="dropdown-menu">
        <li><a href="#">Software Software</a></li>
        <li><a href="#">Software Software</a></li>
    </ul>
</li>
</ul>
</div>
<!-- /.navbar-collapse -->

</div>
<!-- /.container -->
</nav>