Restores the element to the state before FullCalendar was initialized. Removes elements, events handlers, and internal data with check below example. You may also like How to integrate jQuery Fullcalendar using Codeigniter and MySQL and How to add button header in Fullcalendar
Code
$('#md-saveinfo').delegate('.followup_status_caledar','change',function(){
$('.calendar').fullCalendar('destroy');
});