{dede:datalist} 
<a href="<?php $aid = $fields[id];$url=GetOneArchive($aid);echo $url['arcurl']; ?> "><img src="<?php echo $fields['litpic']; ?>"  width="182" height="333"/></a> 
 {/dede:datalist} 
 
//或者 
 
<a href='<?php $aid = $fields[id];$url=GetOneArchive($aid);echo $url['arcurl']; ?> ' target='_blank'>{dede:field.title/}</a>