title: categories in Wordpress sidebar.php
body: <p>the sidebar.php shows</p>
  
  <pre><code>&lt;li&gt;
   &lt;?php wp_list_categories('show_count=1&amp;title_li=&lt;h2&gt;Categories&lt;/h2&gt;'); ?&gt;
  &lt;/li&gt;
  </code></pre>
  
  <p>so which php file generates the Categories in the sidebar (wrapped in <code>a</code> tags and with number of posts)?</p>