[Alex_63]

Batyabest,
А так ?

$('a.menuside,a.playlist').on('click', function(m) {
	m.preventDefault();
	var action = $(this).data('action'),
		mid = $(this).data('mid'),
		mtpl = $(this).data('mtpl');
	var obj = {action:action,mid:mid};
	if (mtpl) { obj['mtpl'] = mtpl; }
	$.post(document.location.href, obj, function(data) {
		$('#wrapcontent').fadeOut(300, function() {
			history.pushState(null, null, murl);
			$(this).html(data).fadeIn(800);
		});
	});
})