Theme hook suggestions for the breadcrumb block I'm using the Omega theme with the Delta module.
How can I theme the breadcrumb block using block--breadcrumb.tpl.php?
I want to change the output of the block to something similar to the following.

&lt;nav id="breadcrumb"&gt;
  &lt;ul&gt;
    &lt;li&gt;&lt;/li&gt;
  &lt;/ul&gt;
&lt;/nav&gt;
You should copy theme_breadcrumb to your theme's template.php file:

function YOURTHEME_breadcrumb($variables) {
  $breadcrumb = $variables['breadcrumb'];
  if (!empty($breadcrumb)) {
      $crumbs = '&lt;nav&gt;&lt;ul class="breadcrumbs"&gt;'; 
      foreach($breadcrumb as $value) {
           $crumbs .= '&lt;li&gt;'.$value.'&lt;/li&gt;';
      }
      $crumbs .= '&lt;/ul&gt;&lt;/nav&gt;';
    }
      return $crumbs;
  }


By this function you can set up a ui li structure.