title: Separate string after equal number of characters with white space
body: <p>basically what I need is to convert <br /><br /> 
  123456789012345678901234567 <br /> to  <br /> 12345 67890 12345 67890 12345 67<br /> <br /> 
  So after each 5th element a white space is inserted. I can do it in old fashioned ways but was wondering if there is a quick alternative.</p>