It's just an issue about the template system of XOOPS.
Do you know how to edit your templates set?

edit line 20 of myalbum*_categories.html of your templates set
[code] <{foreach from=$cat.subcategories item=subcat}>
<{if $subcat.number_of_subcat}>
<a href="<{$mod_url}>/viewcat.php?cid=<{$subcat.cid}>"><img src="<{$mod_url}>/images/folder16.gif" width="16" height="16" alt="" /><{$subcat.title}><img src='<{$mod_url}>/images/subcat.gif' width='15' height='15' /></a>  <br />
<{else}>
<a href="<{$mod_url}>/viewcat.php?cid=<{$subcat.cid}>"><img src="<{$mod_url}>/images/folder16.gif" width="16" height="16" alt="" /><{$subcat.title}></a> (<{$subcat.photo_small_sum}>)   <br />
<{/if}>
<{/foreach}>
[code]