.panel-heading [data-toggle="collapse"]:after {
font-family: 'Glyphicons Halflings';
content: "glyphicon-play"; /* "play" icon */
float: right;
color: #F58723;
font-size: 18px;
line-height: 22px;
/* rotate "play" icon from > (right arrow) to down arrow */
-webkit-transform: rotate(-90deg);
-moz-transform: rotate(-90deg);
-ms-transform: rotate(-90deg);
-o-transform: rotate(-90deg);
transform: rotate(-90deg);
}