How to replace one blockquote tag with span tag php
<p>I have   tag in my content. I need to replace all those tags by span tags: for eg:
 my contenti is wrapped like :</p>

<p><code>&lt;blockquote&gt;&lt;p&gt;my content&lt;/p&gt;&lt;/blockquote&gt;</code> . </p>

<p>I need to replace this with :</p>

<pre><code>&lt;span class="highlight"&gt;content&lt;/span&gt;
</code></pre>

<p>How can i achieve this in PHP. I tried some preg_replace but nothing worked. Can anyone please help.</p>

<p>Thanks in advance.</p>
