.resim
{
width:468px;
height:150px;
background-image : url ("http://alemforum.net/wp-content/themes/simplebalance/img/luckystar/benzer.jpg");
}
.yazi
{
float:left;
margin:2px 0 2px 10em;
height:145px;
width:300px;
}

<div class="resim">
<div class="yazi">
<?php similar_posts(); ?>
</div>
</div>