a[data-toggle="collapse"]::after {
	font-family: "Glyphicons Halflings";
	font-weight: bold;
	font-size: 20px; 
	color: #000;
	float: right;
	content:"\e081";
}
a[aria-expanded="true"]::after {
    font-family: "Glyphicons Halflings";
	content:"\e082";
}