title: How to all same class instance with different URL?
body: <p>Twitter and facebook, among others, display the same page layout and then they fill it with specific information based on url information.</p>
  
  <p>For example: twitter.com/<em>bob</em> will show the <em>profile</em> layout/page but with <em>bob</em> information.</p>
  
  <p>Using a standard URL structure (<em>domain.com/controller/action</em>), how do I call the same controller with a different url each time?</p>