to make the bottom title bar transparent first look for:

ul#drawers li h4 {
    font-size: 16px;
    font-family: ‘The Girl Next Door’, cursive;
    text-align: center;
    -webkit-transition: background-color 0.5s ease-out;
    -moz-transition: background-color 0.5s ease-out;
    transition: background-color 0.5s ease-out;
    background-color:{color:bottom title bar};
    background-image: url(‘{image:bottom title bar}’);
    display:block;
    color: {color:title};
    padding:3px; margin-bottom:0px;
    -moz-border-radius: 20px 20px 0px 0px;
    -webkit-border-radius: 20px 20px 0px 0px;
    border-radius: 20px 20px 0px 0px;
}
 
ul#drawers:hover li h4 {
    background-color:{color:bottom title bar};
    cursor:crosshair;
}

Now change the background-color to background-color:transparent;