카테고리 탭에 빨간색 새글표시하는 방법 (new-basic)

<h3 class="side-title">Categories</h3>
<div class="widget">
<ul class="categories highlight">
<?php for($j=0; $j < count($menu[$i]['sub']); $j++) { ?>
<li>
<a href="<?php echo $menu[$i]['sub'][$j]['href'];?>"<?php echo $menu[$i]['sub'][$j]['target'];?>>
<span class="<?php echo $menu[$i]['sub'][$j]['on'];?>">
<?php echo $menu[$i]['sub'][$j]['name'];?><i style="color:#ff0000" class="fa fa-circle <?php echo $menu[$i]['sub'][$j]['new'];?>"></i>
</span>
</a>
</li>
<?php } ?>
</ul>
</div>