Terrifying Menu block markup (caused by Theme Developer module)

Menu block is a very cool module but :

What is the problem with the default markup ??! It is so complicated.

<span id="thmr_45" class="thmr_call">
  <div class="menu-name-primary-links parent-mlid-0 menu-level-1">
  <span id="thmr_44" class="thmr_call">

  <ul class="menu"><span id="thmr_39" class="thmr_call">
  <li class="expanded first menu-mlid-252"><span id="thmr_38" class="thmr_call">
  <a href="/hommespaysages/nos-valeurs/g%C3%A9n%C3%A9reux-par-nature" title="Nos valeurs">Nos valeurs</a></span>

<span id="thmr_25" class="thmr_call">
  <ul class="menu"><span id="thmr_18" class="thmr_call">
  <li class="leaf first menu-mlid-253"><span id="thmr_17" class="thmr_call">
  <a href="/hommespaysages/nos-valeurs/g%C3%A9n%C3%A9reux-par-nature" title="Généreux par nature">Généreux par nature</a></span>

</li>
</span>

<span id="thmr_20" class="thmr_call">
  <li class="leaf menu-mlid-254"><span id="thmr_19" class="thmr_call">
  <a href="/hommespaysages/nos-valeurs/historique" title="Historique">Historique</a></span>

</li>
</span>

<span id="thmr_22" class="thmr_call">
  <li class="leaf menu-mlid-255"><span id="thmr_21" class="thmr_call">
  <a href="/hommespaysages/nos-valeurs/t%C3%A9moignages" title="Témoignages">Témoignages</a></span>

</li>
</span>

<span id="thmr_24" class="thmr_call">
  <li class="leaf last menu-mlid-256"><span id="thmr_23" class="thmr_call">
  <a href="/hommespaysages/nos-valeurs/charte-engagement" title="Charte d&#039;engagement">Charte d&#039;engagement</a></span>

</li>
</span>

I just need :

<ul>
<li>
<a href="#">Lien 1</a>
<ul>
<li><a href="#">Lien 1.1</a></li>
<li><a href="#">Lien 1.2</a></li>
</ul>
</li>
<li>
<a href="#">Lien 2</a>
<ul>
<li><a href="#">Lien 2.1</a></li>
<li><a href="#">Lien 2.2</a></li>
</ul>
</li>
</ul>