banner.css

/* http://www.csspop.com/clip/show/553 */
.featureBanner {
  position:relative;
  margin:20px
}
.featureBanner:before {
  content: "Featured";
  position:absolute;
  top:5px;
  left:-8px;
  padding-right: 10px;
  color:#000;
  font-weight:bold;
  height:0px;
  border: 15px solid #ffa200;
  border-right-color: transparent;
  line-height:0px;
  box-shadow:-0px 5px 5px -5px #000;
  z-index:1;
}

.featureBanner:after {
  content: "";
  position:absolute;
  top:35px;
  left:-8px;
  border: 4px solid #89540c;
  border-left-color: transparent;
  border-bottom-color: transparent;
}

banner.html

<!-- http://www.csspop.com/clip/show/553 -->
<div class="featureBanner">
  <img src="http://placehold.it/200x150" />
</div>