title: What is the preg_replace regex to replace this HTML tag?
body: <p>How would I convert strings like this:</p>
  
  <pre><code>&lt;span class="it"&gt;CONTENT&lt;/span&gt;
  </code></pre>
  
  <p>Into this:</p>
  
  <pre><code>{it}CONTENT{/it}
  </code></pre>
  
  <p>While keeping CONTENT intact?  </p>