$(document).ready(function(){
 
  activeItem3 = $("#accordion3 li a:first");
  $(activeItem3).addClass('active');
 
  $("#accordion3 li a").click(function(){
      $(activeItem3).animate({width: "40px"}, {duration:500, queue:false});
      $(this).animate({width: "680px"}, {duration:500, queue:false});
      activeItem3 = this;
  });
 
});