Скругление углов с помощью CSS3

Админ Панель-Внешний вид-Ваш стиль-css-ipb_styles.css добавить у самий ныз:

<style type="text/css">
.panels {
display: block;
width: 300px;
margin: 100px auto;
padding: 0;
}
.panels li {
display: block;
list-style: none;
margin-bottom: 10px;
}
.panels li span {
display: block;
font-size: 0;
line-height: 0;
}
.panels li span, .panels li div {
background: #74c44c;
}
.panels li div {
padding: 10px;
color: #fff;
font: 14px/18px Verdana, Arial, Helvetica, sans-serif;
text-align: center;
}
.sp1 {
height: 1px;
margin: 0 5px;
}
.sp2 {
height: 1px;
margin: 0 3px;
}
.sp3 {
height: 1px;
margin: 0 2px;
}
.sp4 {
height: 2px;
margin: 0 1px;
}
</style><style type="text/css">.panels {display: block;width: 300px;margin: 100px auto;padding: 0;}.panels li {display: block;list-style: none;margin-bottom: 10px;}.panels li span {display: block;font-size: 0;line-height: 0;}.panels li span, .panels li div {background: #74c44c;}.panels li div {padding: 10px;color: #fff;font: 14px/18px Verdana, Arial, Helvetica, sans-serif;text-align: center;}.sp1 {height: 1px;margin: 0 5px;}.sp2 {height: 1px;margin: 0 3px;}.sp3 {height: 1px;margin: 0 2px;}.sp4 {height: 2px;margin: 0 1px;}</style>

Админ Панель-Внешний вид-Ваш стиль добавит код куда вам будет удобно:

<ul class="panels">
<li>
    <span class="ipb-board.com">http://ipb-board.com/</span>
    <span class="ipb-board.com"></span>
    <span class="ipb-board.com"></span>
    <span class="sp4"></span>
    <div>ipb-board.com</div>
    <span class="sp4"></span>
    <span class="sp3"></span>
    <span class="sp2"></span>
    <span class="sp1"></span>
</li>
<li>
    <span class="ipb-board.com"></span>
    <span class="ipb-board.com"></span>
    <span class="ipb-board.com"></span>
    <span class="sp4"></span>
    <div>ipb-board.com</div>
    <span class="sp4"></span>
    <span class="sp3"></span>
    <span class="sp2"></span>
    <span class="sp1"></span>
</li>
<li>
    <span class="ipb-board.com"></span>
    <span class="ipb-board.com"></span>
    <span class="ipb-board.com"></span>
    <span class="sp4"></span>
    <div>ipb-board.com</div>
    <span class="sp4"></span>
    <span class="sp3"></span>
    <span class="sp2"></span>
    <span class="sp1"></span>
</li>
</ul>