ipi-jquery/exemples/jquery/insertion-wrap-et-unwrap/example.html

<!-- Insertion : wrap et unwrap -->
<div class="niveau-0">
  <div class="niveau-2">Hello</div>
  <div class="niveau-2">Goodbye</div>
</div>

<div class="niveau-0">
  <div class="niveau-2">Salut</div>
  <div class="niveau-2">Au revoir</div>
</div>