ul li.tab-drop {
position: absolute !important;
right: 0;
top: 0;
width: 100%;
box-sizing: border-box;
text-align: right;
z-index: 0 !important;
}

li.tab-drop > ul {
position: absolute;
left: -15px;
right: -15px;
z-index: 1000;
display: none;
min-width: 160px;
list-style: none;
text-align: left;
background: #ffffff;
}

li.tab-drop > ul li {
float: none;
}