Edit in JSFiddle

<img src="http://htmljs.b0.upaiyun.com/uploads/1392273296947-circle-backward-128.png" alt="">
<img class="rotate" src="http://htmljs.b0.upaiyun.com/uploads/1392273296947-circle-backward-128.png" alt="">

.rotate{
    -webkit-transform: rotate(180deg); /*Firefox*/
    -moz-transform: rotate(180deg); /*Chrome*/
    -ms-transform: rotate(180deg); /*IE9 、IE10*/
    -o-transform: rotate(180deg); /*Opera*/
    transform: rotate(180deg);
}