.dropdown-submenu{ position: relative; }

.dropdown-submenu>.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;
}

.dropdown-submenu>a:after{
  display:block;
  content:" ";
  float:right;
  width:0;
  height:0;
  border-color:transparent;
  border-style:solid;
  border-width:5px 0 5px 5px;
  border-left-color:#cccccc;
  margin-top:5px;margin-right:-10px;
}
.dropdown-submenu:hover>a:after{
  border-left-color:#555;
}
.dropdown-submenu.pull-left{ float: none; }
.dropdown-submenu.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;
}

@media (min-width: 768px) { 

}
@media (min-width: 992px) { 

}
@media (min-width: 1200px) { 

}