title: How to change the "current" class to "active" in KNPMenuBundle
body: <p>I was wondering, what is the best way to change the "current" class to be "active" so Bootstrap will work correctly with it?</p>
  
  <p>I thought about copying and overriding the knp_menu_html.twig but i think its not the best way...</p>
  
  <p>Anyway better doing it? </p>