그런데 수정화면으로 넘어가면 체크해제하고 저장해도 해제상태로 표시가 되지 않습니다.

해결 방법이 있을까요? 

<label class="attr-name" for="kboard_option_maintenance">정비목록 <span class="require">*</span></label>
<ul class="attr-value">
	<li>
		<label class="attr-value-label"><input type="checkbox" name="kboard_option_maintenancesort01" value="엔진오일세트"<?php if($content->option->maintenancesort01 == '엔진오일세트'):?> checked<?php endif?>>엔진오일세트</label>
		<input type="text" id="kboard_option_maintenancesort01price" name="kboard_option_maintenancesort01price" value="<?php echo $content->option->maintenancesort01price?>"></div>
	</li>
	<li>
		<label class="attr-value-label"><input type="checkbox" name="kboard_option_maintenancesort02" value="에어컨필터"<?php if($content->option->maintenancesort02 == '에어컨필터'):?> checked<?php endif?>>에어컨필터</label>
		<input type="text" id="kboard_option_maintenancesort02price" name="kboard_option_maintenancesort02price" value="<?php echo $content->option->maintenancesort02price?>"></div>
	</li>
</ul>