Horizontal centered menu

gistfile1.scss

#horizontal-centered-menu {
  float:left;
  width:100%;
  overflow:hidden;
  position:relative;
  ul {
    clear:left;
    float:left;
    list-style:none;
    position:relative;
    left:50%;
    text-align:center;
    li {
      display:block;
      float:left;
      list-style:none;
      position:relative;
      right:50%;
      a {
       display:block;
      }
    }
  }
}