<nav id="am-fil-ariane" aria-label="Fil d'ariane" class="fil-ariane"> 
  <ul class="nav">
    <li class="nav-item"><span class="nav-link">vous êtes ici</span></li>
    <li class="nav-item"><a aria-current="page">Accueil</a></li>
  </ul>
</nav> 

<nav id="am-fil-ariane" aria-label="Fil d'ariane" class="fil-ariane"> 
  <ul class="nav">
    <li class="nav-item"><span class="nav-link">vous êtes ici</span></li>
    <li class="nav-item"><a href="#" class="nav-link">Accueil</a></li>
    <li class="nav-item"><a href="#" class="nav-link">CMU</a></li>
    <li class="nav-item"><a aria-current="page">Dossier client</a></li>
  </ul>
</nav>