$(document).ready(function () {

  // First we hide all exhibitis  
  $("#menu ul li.section-title").nextAll().hide();

  // then the active exhibit is showed
  $("#menu ul").each(function(){
    $(this).find("li.active").prevAll().nextAll().show();
  });

  // This is the toggle function
  // first it hides all sections
  $("#menu ul li.section-title").click(function(){
    $("#menu ul li.section-title").nextAll().hide();
    $(this).nextAll().slideToggle("fast");
  });

  $("#menu ul li.section-title").addClass("fake-link");


});