말씀하신 것처럼 적용하시려면 스킨 파일을 수정해주셔야 할 듯합니다.

FTP로 접속해서 /wp-content/plugins/kboard/skin/사용중인스킨/list.php 파일에

아래의 코드를 찾아서

<a href="<?php echo $url->getDocumentURLWithUID($content->uid)?>">
	
	<?php if($content->getThumbnail(330, 160)):?>
		<div class="kboard-list-thumbnail" style="background-image:url(<?php echo $content->getThumbnail(330, 160)?>)"></div>
	<?php else:?>
		<div class="kboard-list-thumbnail" style=""></div>
	<?php endif?>
	
	<div class="kboard-list-title"><div class="kboard-card-gallery-cut-strings">
		<?php echo $content->title?>
		<?php echo $content->getCommentsCount()?>
		<?php if($content->secret):?><img src="<?php echo $skin_path?>/images/icon-lock.png" alt="<?php echo __('Secret', 'kboard')?>"><?php endif?>
	</div></div>
	
	<div class="kboard-list-summary"><?php echo trim(strip_tags($content->content))?></div>
	
	<div class="kboard-list-catetory">
	<?php if($content->category1):?>
	<?php echo $content->category1?>
	<?php endif?>
	<?php if($content->category2):?>
	<?php echo $content->category2?>
	<?php endif?>
	<?php if($content->option->tree_category_1):?>
	<?php for($i=1; $i<=$content->getTreeCategoryDepth(); $i++):?>
	<?php echo $content->option->{'tree_category_'.$i}?>
	<?php endfor?>
	<?php endif?>
	</div>
	
	<div class="kboard-list-user"><?php echo $content->getUserDisplay()?></div>
	
	<?php if($content->vote):?>
	<div class="kboard-list-vote"><img src="<?php echo $skin_path?>/images/icon-heart.png" alt="<?php echo __('Vote', 'kboard')?>"> <?php echo intval($content->vote)?></div>
	<?php endif?>
</a>

아래의 코드로 교체해보시겠어요?

<a href="<?php echo $url->getDocumentURLWithUID($content->uid)?>">
	
	<?php if($content->getThumbnail(330, 160)):?>
		<div class="kboard-list-thumbnail" style="background-image:url(<?php echo $content->getThumbnail(330, 160)?>)"></div>
	<?php else:?>
		<div class="kboard-list-thumbnail" style=""></div>
	<?php endif?>
	
	<div class="kboard-list-title"><div class="kboard-card-gallery-cut-strings">
		<?php echo $content->title?>
		<?php echo $content->getCommentsCount()?>
		<?php if($content->secret):?><img src="<?php echo $skin_path?>/images/icon-lock.png" alt="<?php echo __('Secret', 'kboard')?>"><?php endif?>
	</div></div>
	
	<div class="kboard-list-summary"><?php echo trim(strip_tags($content->content))?></div>
</a>
<div class="kboard-list-catetory">
<?php if($content->category1):?>
<a href="<?php echo $url->set('category1', $content->category1)->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->toString()?>"><?php echo $content->category1?></a>
<?php endif?>
<?php if($content->category2):?>
<a href="<?php echo $url->set('category2', $content->category2)->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->toString()?>"><?php echo $content->category2?></a>
<?php endif?>
<?php if($content->option->tree_category_1):?>
<?php for($i=1; $i<=$content->getTreeCategoryDepth(); $i++):?>
<a href="#" onclick="return kboard_tree_category_search('<?php echo $board->tree_category->depth?>', '<?php echo $content->option->{'tree_category_'.$i}?>')"><?php echo $content->option->{'tree_category_'.$i}?></a>
<?php endfor?>
<?php endif?>
</div>
<a href="<?php echo $url->getDocumentURLWithUID($content->uid)?>">	
	<div class="kboard-list-user"><?php echo $content->getUserDisplay()?></div>
	
	<?php if($content->vote):?>
	<div class="kboard-list-vote"><img src="<?php echo $skin_path?>/images/icon-heart.png" alt="<?php echo __('Vote', 'kboard')?>"> <?php echo intval($content->vote)?></div>
	<?php endif?>
</a>

고맙습니다.