i already have a #menu for my css file i can seem to get the html to use this code?

[temeculawebbuilder]

menuId a:link, a:active, a:visited {
color: #0F0;
}
#menuId a:hover {
background-color: #000;
color: #FFF;
}

how do i make this show up in html when i already have a #menu for css file and a <div id="menu">
do i have to put <div id=menuId a:hover > </div> into html?