Hi yodam1
You can create a new module menu type, select your menu to be showed and then add to it a custom style from your custom.css
as you can see from image it uses the menu class horzmenu, so you should add such class in custom.css file
below is the class code that you can customize as you wish
.horzmenu > li.active > a, .horzmenu > li.active > a:hover, .horzmenu > li.active > a:focus {
color: #000;
background-color: transparent!important;
}
.horzmenu > li > a {
border-radius: 0px;
position: relative;
display: block;
padding: 15px 10px;
float: left;
}
.horzmenu > li > ul > li> a {
padding: 2px 2px;
}
This is the result
Hope it helps