.ul_menu_studio {
  position: relative;
  height: 30px;
  margin: 0;
  overflow: hidden;
  padding: 0 0 0 40px;
}

.ul_menu_studio li {
  float: left;
  list-style: none;
}

.ul_menu_studio li.back {
  background: url(../img/fond_menu_on.png) no-repeat right -30px;
  width: 9px; 
  height: 30px;
  z-index: 8;
  position: absolute;
}

.ul_menu_studio li.back .left {
  background: url(../img/fond_menu_on.png) no-repeat top left;
  height: 30px;
  margin-right: 9px; /* 7px is the width of the rounded shape */
}

.ul_menu_studio li a {
  text-decoration: none;
  color: #6a2169;
  outline: none;
  text-align: center;
  top: 7px;
  text-transform: uppercase;
  letter-spacing: 0;
  z-index: 10;
  display: block;
  float: left;
  height: 30px;
  position: relative;
  overflow: hidden;
  margin: auto 17px;
  font-weight: bold;
  font-size: 1.1em;
}

.ul_menu_studio li a:hover, .ul_menu_studio li a:active, .ul_menu_studio li a:visited {
  border: none;
}