Blog-Domain in CSS schreiben

#main a[href^="http:"], #col1 a[href^="https:"]
{
    padding-left: 12px;
    background-image: url('images/icons/ext_link.gif');
    background-repeat: no-repeat;
    background-position: 0 0.45em;
}


#main a[href^="http://domain.de"],
#main a[href^="http://www.domain.de"] {
background: transparent;
padding-left: 0px;
}

<?
$urlwww = $_SERVER['HTTP_HOST']; 
$urlnowww = str_replace("www.", "", "$urlwww");
?> 
<style type="text/css">
#main a[href^="http:"], #main a[href^="https:"], #main a[href^="ftp:"], #main a[href^="mailto:"]
{
    padding-left: 12px;
    background-repeat: no-repeat;
    background-position: 0 0.45em;
}


#main a[href^="http:"], #main a[href^="https:"] {background-image: url('<?php bloginfo('template_directory'); ?>/images/icons/ext_link.gif');}
#main a[href^="ftp:"] {    background-image: url('<?php bloginfo('template_directory'); ?>/images/icons/dir.gif');}
#main a[href^="mailto:"]{background-image: url('<?php bloginfo('template_directory'); ?>/images/icons/file.gif');}


#main a.imagelink, 
#main a[href^="http://<?php echo $urlnowww; ?>"],
#main a[href^="http://www.<?php echo $urlnowww; ?>"] {
    background: transparent;
    padding-left: 0px;
}
</style>