list-category-default.php 파일을 수정하시려면

아래의 코드를 찾아서

<?php if($board->initCategory1()):?>
	<ul class="kboard-category-list">
		<li<?php if(!kboard_category1()):?> class="kboard-category-selected"<?php endif?>><a href="<?php echo $url->set('category1', '')->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->tostring()?>"><?php echo __('All', 'kboard')?></a></li>
		<?php while($board->hasNextCategory()):?>
		<li<?php if(kboard_category1() == $board->currentCategory()):?> class="kboard-category-selected"<?php endif?>>
			<a href="<?php echo $url->set('category1', $board->currentCategory())->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->toString()?>"><?php echo $board->currentCategory()?></a>
		</li>
		<?php endwhile?>
	</ul>
<?php endif?>

<?php if($board->initCategory2()):?>
	<ul class="kboard-category-list">
		<li<?php if(!kboard_category2()):?> class="kboard-category-selected"<?php endif?>><a href="<?php echo $url->set('category2', '')->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->tostring()?>"><?php echo __('All', 'kboard')?></a></li>
		<?php while($board->hasNextCategory()):?>
		<li<?php if(kboard_category2() == $board->currentCategory()):?> class="kboard-category-selected"<?php endif?>>
			<a href="<?php echo $url->set('category2', $board->currentCategory())->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->toString()?>"><?php echo $board->currentCategory()?></a>
		</li>
		<?php endwhile?>
	</ul>
<?php endif?>

아래의 코드로 교체해보시겠어요?

<?php if($board->initCategory1()):?>
	<ul class="kboard-category-list">
		<?php while($board->hasNextCategory()):?>
		<li<?php if(kboard_category1() == $board->currentCategory()):?> class="kboard-category-selected"<?php endif?>>
			<a href="<?php echo $url->set('category1', $board->currentCategory())->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->toString()?>"><?php echo $board->currentCategory()?></a>
		</li>
		<?php endwhile?>
		<li<?php if(!kboard_category1()):?> class="kboard-category-selected"<?php endif?>><a href="<?php echo $url->set('category1', '')->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->tostring()?>"><?php echo __('All', 'kboard')?></a></li>
	</ul>
<?php endif?>

<?php if($board->initCategory2()):?>
	<ul class="kboard-category-list">
		<?php while($board->hasNextCategory()):?>
		<li<?php if(kboard_category2() == $board->currentCategory()):?> class="kboard-category-selected"<?php endif?>>
			<a href="<?php echo $url->set('category2', $board->currentCategory())->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->toString()?>"><?php echo $board->currentCategory()?></a>
		</li>
		<?php endwhile?>
		<li<?php if(!kboard_category2()):?> class="kboard-category-selected"<?php endif?>><a href="<?php echo $url->set('category2', '')->set('pageid', '1')->set('target', '')->set('keyword', '')->set('mod', 'list')->tostring()?>"><?php echo __('All', 'kboard')?></a></li>
	</ul>
<?php endif?>

고맙습니다.

CSS로도 충분할거같은데요

.kboard-category .kboard-category-list li:first-child{float:right;}

위 코드를 테마내 style.css에 추가하시면 "전체" 카테고리가 가장 우측으로 갈겁니다.

다만 카테고리 맨우측이 아닌 화면기준 맨 우측으로가니 거기서 약간의 수정이 더 필요하겠네요