<!--{if P8_TIME-3600*24*2<$value['timestamp']}--><span class="datatime" style="font-size:14px;">news</span><!--{/if}-->

参考

<!--{php168}-->
<ul class="adaplist11" style="font-size:14px;color:#454545;">
<!--{foreach $list $value}-->
<li>
        <a href="$value[url]" target="_blank" title="$value[full_title]">$value[title]</a>
        <!--{if P8_TIME-3600*24*2<$value['timestamp']}--><span class="datatime" style="font-size:14px;">news</span><!--{/if}-->
    </li>
<!--{/foreach}-->
</ul>
<!--{/php168}-->