$(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");
  });
   });