Copie-colle le code ci-dessous dans la feuille de style de ton blog

/*bloc1*/
#bloc1 {
border: 1px solid #9FC1FB;
width:194px;
display:block;
background-color:#F4f4f4;
margin-left: 0;
padding-left: 0;
}

#bloc1 br{
display:none;
}

#bloc1 p{
display:none;
}

#bloc1 h2{
color:#fff;
background-color:#9FC1FB;
width:194px;
margin:0;
padding:0;
font-size:1.2em;
text-align:center;
font-weight: normal;
}
#bloc1 ul {
padding-left: 0;
margin-left:0px;
margin-bottom:3px;
margin-top:3px;
}
#bloc1 ul li {
list-style-type:none;
padding: 1px 0;
margin-left: 4px;
border-bottom: 1px solid #EBEBEB;
width:186px;
}
#bloc1 ul li a {
width:186px;
display:block;
color: #000;
text-decoration:none;
-moz-border-radius: 4px;
font-size:1em;
}
#bloc1 ul li a:hover {
background-color:#ffe566;
color:#ff6600;
font-size:1em;
}
/*bloc1*/