make a structure like this, and you have done
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">WebSiteName</a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li><a href="#">Brädspel</a></li>
<li><a href="#">Samlarkortspel</a></li>
<li><a href="#">Figurspel</a></li>
<li><a href="#">Tillbehör</a></li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li class=""><a href="#">Registrera</a></li>
<li class=""><a href="#">Logga in</a></li>
<li class=""><a href="#"> Önskelista (0)</a></li>
<li class=""><a href="#">Kundvagn</a></li>
<li class=""><a href="#">Kassan</a></li>
</ul>
</div>
</div>
</nav>
</div>