$(document).ready(function()
{
  //hide the all of the element with class toggle_body
  $(".toggle_body").hide();
  //toggle the content with class toggle_body
  $(".toggle_head").click(function()
  {
  // 200 is good for fast, and 600 for slow open
    $(this).next(".toggle_body").slideToggle(200);
  });
});