title: htaccess rewrite rule disregard directory
body: <p>I am new to using htaccess and rewite rules.
  I need to write a rewrite rule which "disregards" any directory starting with a certain prefix.</p>
  
  <p>For example, any directory starting with <code>_prefix_</code>should be disregarded so that</p>
  
  <pre><code>http://www.myserver.com/mydir/_prefix_12n3n4n/subdir/file
  </code></pre>
  
  <p>should be redirected to<br>
      <code>http://www.myserver.com/mydir/subdir/file</code></p>
  
  <p>Can anyone tell me how this would be done?</p>