title: How to use multiple themes in codeigniter like wordpress
body: <p>I want to use multiple themes in codeigniter like wordpress.</p>
  
  <p>e.g</p>
  
  <p>Themes are A, B, C.</p>
  
  <p>if i select Theme A then html would be change Theme A wise.
  if i select Theme B then html would be change Theme B wise.
  etc.</p>
  
  <p>please help and thanks in advance.</p>