kboard_get_template_field_html 필터를 활용해서 코드를 추가하신 건지요?

기존의 코드 대신 아래의 코드를 활용해보시겠어요?

add_filter('kboard_get_template_field_html', 'my_kboard_get_template_field_html', 10, 4);
function my_kboard_get_template_field_html($field_html, $field, $content, $board){
	if($board->id == '1'){ // 실제 게시판 id로 적용해주세요.
		if($field['field_type'] == 'category1'){
			$fields = $board->fields();
			$meta_key = (isset($field['meta_key']) && $field['meta_key']) ? $field['meta_key'] : '';
			$field_name = (isset($field['field_name']) && $field['field_name']) ? $field['field_name'] : $field['field_label'];;
			$required = (isset($field['required']) && $field['required']) ? $field['required'] : $field['required'];;
			
			ob_start();
			?>
			<?php if(!$board->isTreeCategoryActive()):?>
				<?php if($board->initCategory1()):?>
					<div class="kboard-attr-row <?php echo esc_attr($field['class'])?><?php if($required):?> required<?php endif?>">
						<label class="attr-name" for="<?php echo esc_attr($meta_key)?>"><span class="field-name"><?php echo esc_html($field_name)?></span><?php if($required):?> <span class="attr-required-text">*</span><?php endif?></label>
						<div class="attr-value">
							<select id="<?php echo esc_attr($meta_key)?>" name="category1" class="<?php if($required):?> required<?php endif?>">
								<option value=""><?php echo __('Category', 'kboard')?> <?php echo __('Select', 'kboard')?></option>
								<?php while($board->hasNextCategory()):?>
								<option value="<?php echo $board->currentCategory()?>"<?php if(($content->category1?$content->category1:kboard_category1()) == $board->currentCategory()):?> selected<?php endif?>><?php echo $board->currentCategory()?></option>
								<?php endwhile?>
							</select>
							<?php if(isset($field['description']) && $field['description']):?><div class="description"><?php echo esc_html($field['description'])?></div><?php endif?>
						</div>
					</div>
				<?php endif?>
			<?php endif?>
			<?php
			$field_html = ob_get_clean();
		}
		else if($field['field_type'] == 'category2'){
			$fields = $board->fields();
			$meta_key = (isset($field['meta_key']) && $field['meta_key']) ? $field['meta_key'] : '';
			$field_name = (isset($field['field_name']) && $field['field_name']) ? $field['field_name'] : $field['field_label'];;
			$required = (isset($field['required']) && $field['required']) ? $field['required'] : $field['required'];;
			
			ob_start();
			?>
			<?php if(!$board->isTreeCategoryActive()):?>
				<?php if($board->initCategory2()):?>
					<div class="kboard-attr-row <?php echo esc_attr($field['class'])?><?php if($required):?> required<?php endif?>">
						<label class="attr-name" for="<?php echo esc_attr($meta_key)?>"><span class="field-name"><?php echo esc_html($field_name)?></span><?php if($required):?> <span class="attr-required-text">*</span><?php endif?></label>
						<div class="attr-value">
							<select id="<?php echo esc_attr($meta_key)?>" name="category2" class="<?php if($required):?> required<?php endif?>">
								<option value=""><?php echo __('Category', 'kboard')?> <?php echo __('Select', 'kboard')?></option>
								<?php while($board->hasNextCategory()):?>
								<option value="<?php echo $board->currentCategory()?>"<?php if(($content->category2?$content->category2:kboard_category2()) == $board->currentCategory()):?> selected<?php endif?>><?php echo $board->currentCategory()?></option>
								<?php endwhile?>
							</select>
							<?php if(isset($field['description']) && $field['description']):?><div class="description"><?php echo esc_html($field['description'])?></div><?php endif?>
						</div>
					</div>
				<?php endif?>
			<?php endif?>
			<?php
			$field_html = ob_get_clean();
		}
	}
	
	return $field_html;
}

위의 코드를 적용하시면

카테고리1과 카테고리2를 워드프레스 관리자 페이지 입력필드 설정에서

필수로 설정할 경우 필수로 선택해야 게시글이 저장됩니다.

고맙습니다.