gistfile1.less

.dropdown-submenu {
  position: relative;

  & > .dropdown-menu {
	top: 0;
	left: 100%;
	margin-top: -6px;
	margin-left: -1px;
	-webkit-border-radius: 0 6px 6px 6px;
	-moz-border-radius: 0 6px 6px 6px;
	border-radius: 0 6px 6px 6px;
  }

  &:hover > .dropdown-menu {
	display: block;
  }

  & > a:after {
	display: block;
	content: " ";
	float: right;
	width: 0;
	height: 0;
	border: 5px solid transparent;
	border-right-width: 0;
	border-left-color: #cccccc;
	margin-top: 5px;
	margin-right: -10px;
  }

  &:hover > a:after {
	border-left-color: #ffffff;
  }

  &.pull-left {
	float: none;
  }

  &.pull-left > .dropdown-menu {
	left: -100%;
	margin-left: 10px;
	-webkit-border-radius: 6px 0 6px 6px;
	-moz-border-radius: 6px 0 6px 6px;
	border-radius: 6px 0 6px 6px;
  }

}