Find html text and tag parent
<p>There is such a structure</p>

<pre><code>&lt;tr class=""&gt;
   ...               
                        &lt;span class=""&gt;my-marker-1&lt;/span&gt;
   ...
 &lt;/tr&gt;
</code></pre>

<p>How to find only word "<strong>marker</strong>" and give the <strong>tr</strong> a special class?</p>
