li.dhtml-folder {
  position: relative;
}

.dhtml-menu a.dhtml-menu-icon {
  position: absolute;
  left: -22px;
}

.menu li.dhtml-folder.expanded {
  list-style-image: none !important;
}
.menu li.dhtml-folder.collapsed {
  list-style-image: none !important;
}

.menu li.dhtml-folder.expanded > ul.menu {
  overflow: visible !important;
}

.menu li.dhtml-folder.expanded:before {
    background:url("images/plus_minus_icons.png") no-repeat 0px 0px;
    background-size: auto 100%;
    width:20px;
    height:20px;
    display:block;
    position:absolute;
    content: " ";
    left: -26px;
    top: 0px;
}

.menu li.dhtml-folder.collapsed:before {
    background:url("images/plus_minus_icons.png") no-repeat -20px 0px;
    background-size: auto 100%;
    width:20px;
    height:20px;
    display:block;
    position:absolute;
    content: " ";
    left: -26px;
    top: 0px;
}