title: clean up wordpress custom navigation
body: <p>i have made a custom menu named "header-menu" and i call it in my header.php:</p>
  
  <pre><code>&lt;?php wp_nav_menu( array( 
  'container' =&gt; '',
  'theme_location' =&gt; 'header-menu'
  ) ); ?&gt;
  </code></pre>
  
  <p>with</p>
  
  <pre><code>'container' =&gt; '',
  </code></pre>
  
  <p>i want to remove the menu wrapper, but the output still has this:</p>
  
  <pre><code>&lt;div class="menu"&gt;
  &lt;ul&gt;
  &lt;li&gt; ... &lt;/li&gt;
  &lt;li&gt; ... &lt;/li&gt;
  &lt;/ul&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>but i want to get rid of the annoying</p>
  
  <pre><code>&lt;div class="menu"&gt;
  </code></pre>
  
  <p>. how to do that?</p>