title: Adding <span> tags around each primary item in Drupal
body: <p>I'd like my primary links in Drupal to look like this in code:</p>
  
  <pre><code>&lt;a class="active" title="Go to the Foo Homepage" href="/"&gt;&lt;span&gt;Home&lt;/span&gt;&lt;/a&gt;
  </code></pre>
  
  <p>Rather than:</p>
  
  <pre><code>&lt;a class="active" title="Go to the Foo Homepage" href="/"&gt;Home&lt;/a&gt;
  </code></pre>
  
  <p>So I can then style the <code>span</code> separately from the <code>a</code>.</p>
  
  <p>(I know that sounds like a slightly strange thing to do, but it's to do with working around IE's lack of border-radius support coupled with the inability to set 2 background images.)</p>
  
  <p>So do you know where &amp; how I get Drupal to insert these tags in all my primary links?</p>