]]></b:skin>

Acima dessa linha cole o código CSS abaixo:

nav  {

        display: block;

        width: 100%;

        overflow: hidden;

}

nav ul {

        margin: 80px 0 20px 0;

        padding: .7em;

        float: left;

        list-style: none;

        background: #444;

        background: rgba(0,0,0,.2);

        -moz-border-radius: .5em;

        -webkit-border-radius: .5em;

        border-radius: .5em;

        -moz-box-shadow: 0 1px 0 rgba(255,255,255,.2), 0 2px 1px rgba(0,0,0,.8) inset;

        -webkit-box-shadow: 0 1px 0 rgba(255,255,255,.2), 0 2px 1px rgba(0,0,0,.8) inset;

        box-shadow: 0 1px 0 rgba(255,255,255,.2), 0 2px 1px rgba(0,0,0,.8) inset;

}

nav li {

        float:left;

}

nav a {

        float:left;

        padding: .8em 1.5em;

        text-decoration: none;

        color: #555;

        text-shadow: 0 1px 0 rgba(255,255,255,.5);

        font: bold 1.1em/1 'trebuchet MS', Arial, Helvetica;

        letter-spacing: 1px;

        text-transform: uppercase;

        border-width: 1px;

        border-style: solid;

        border-color: #fff #ccc #999 #eee;

        background: #c1c1c1;

        background: -moz-linear-gradient(#f5f5f5, #c1c1c1);

        background: -webkit-gradient(linear, left top, left bottom, from(#f5f5f5), to(#c1c1c1));

        background: -webkit-linear-gradient(#f5f5f5, #c1c1c1);

        background: -o-linear-gradient(#f5f5f5, #c1c1c1);

        background: -ms-linear-gradient(#f5f5f5, #c1c1c1);

        background: linear-gradient(#f5f5f5, #c1c1c1);

}

nav a:hover, nav a:focus {

        outline: 0;

        color: #fff;

        text-shadow: 0 1px 0 rgba(0,0,0,.2);

        background: #fac754;

        background: -moz-linear-gradient(#fac754, #f8ac00);

        background: -webkit-gradient(linear, left top, left bottom, from(#fac754), to(#f8ac00));

        background: -webkit-linear-gradient(#fac754, #f8ac00);

        background: -o-linear-gradient(#fac754, #f8ac00);

        background: -ms-linear-gradient(#fac754, #f8ac00);

        background: linear-gradient(#fac754, #f8ac00);

}

nav a:active {

        -moz-box-shadow: 0 0 2px 2px rgba(0,0,0,.3) inset;

        -webkit-box-shadow: 0 0 2px 2px rgba(0,0,0,.3) inset;

        box-shadow: 0 0 2px 2px rgba(0,0,0,.3) inset;

}

nav li:first-child a {

        border-left: 0;

        -moz-border-radius: 4px 0 0 4px;

        -webkit-border-radius: 4px 0 0 4px;

        border-radius: 4px 0 0 4px;

}

nav li:last-child a {

        border-right: 0;

        -moz-border-radius: 0 4px 4px 0;

        -webkit-border-radius: 0 4px 4px 0;

        border-radius: 0 4px 4px 0;

}

Feito isso, salve.

Agora acesse a guia “Layout” do seu blog e clique na opção “Adicionar um gadget” –> “HTML/Javascript”. Em seguida cole o código abaixo, faça as alterações conforme o que se pede (destacado de vermelho no código) e salve.

<nav>

    <ul>

         <li><a href="LINK">ITEM</a></li>  

         <li><a href="LINK">ITEM</a></li>  

         <li><a href="LINK">ITEM</a></li>  

         <li><a href="LINK">ITEM</a></li>  

         <li><a href="LINK">ITEM</a></li> 

    </ul>

</nav>