title: Regex to get a URL containing a keyword
body: <p>Due to redbubble.com's lack of an API, I'm using an ATOM feed to steal information about a user's pictures.</p>
  
  <p>This is what the XML looks like:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;entry&gt;
    &lt;id&gt;ID&lt;/id&gt;
    &lt;published&gt;Date Published&lt;/published&gt;
    &lt;updated&gt;Date Updated&lt;/updated&gt;
    &lt;link type="text/html" rel="alternate" href="http://www.redbubble.com/link/to/post"/&gt;
    &lt;title&gt;Title&lt;/title&gt;
    &lt;content type="html"&gt;
      Blah blah blah stuff about the image..
      &amp;lt;a href="http://www.redbubble.com/products/configure/config-id"&amp;gt;&amp;lt;img src="http://ih1.redbubble.net/path-to-image" alt="" /&amp;gt;
    &lt;/content&gt;
    &lt;author&gt;
    &lt;name&gt;Author Name&lt;/name&gt;
    &lt;uri&gt;http://www.redbubble.com/people/author-user-name&lt;/uri&gt;
    &lt;/author&gt;
    &lt;link type="image/jpeg" rel="enclosure" href="http://ih0.redbubble.net/path-to-the-original-image"/&gt;
    &lt;category term="1"/&gt;
    &lt;category term="2"/&gt;
  &lt;/entry&gt;
  </code></pre>
  
  <p>Basically using regex... how would I go about getting the <code>href</code> property inside the link in the content tag?</p>
  
  <p>One thing we know for sure is it will always have configure in the path i.e. <code>http://somesite.com/**configure**/id</code></p>
  
  <p>So basically I just need to find the URL with configure in and grab the whole thing...</p>