$(document).on('click', '.sppb-panel-heading', function(event){
    event.preventDefault();
    var $this = $(this);
    var $items = $this.closest('.sppb-panel-group').find('>div');
    var $handlers = $items.find('.sppb-panel-heading');
    var $panels = $items.find('.sppb-panel-collapse');

    if( $(this).hasClass('active') )
    {
      $(this).removeClass('active');
      $panels.slideUp();
    }
    else
    {
      $handlers.removeClass('active');
      $panels.slideUp();
      $(this).addClass('active').next().slideDown();
}