「Meta Box」　出力コードまとめ

<?php echo rwmb_meta( 'フィールドID' ); ?>

<?php
// テキスト
$title_sub = rwmb_get_value('title_sub');
if ( ! empty($title_sub) ) {
    echo '<p class="title-sub">' . esc_html($title_sub) . '</p>';
}

// URL
$link_url = rwmb_get_value('link_url');
if ( ! empty($link_url) ) {
    echo '<a class="btn" href="' . esc_url($link_url) . '">詳しく見る</a>';
}

// WYSIWYG（HTML許可）
$desc = rwmb_get_value('desc');
if ( ! empty($desc) ) {
    echo '<div class="desc">' . wp_kses_post($desc) . '</div>';
}

<?php
$rows = rwmb_get_value( 'faq_group' ); // group: question, answer
if ( $rows ) : ?>
  <dl class="faq">
    <?php foreach ( $rows as $row ) : ?>
      <div class="faq__item">
        <dt class="faq__q"><?php echo esc_html( $row['question'] ); ?></dt>
        <dd class="faq__a"><?php echo wp_kses_post( $row['answer'] ); ?></dd>
      </div>
    <?php endforeach; ?>
  </dl>
<?php endif; ?>

<?php
$rows = rwmb_get_value('faq_group'); // group: question, answer
if ( ! empty($rows) && is_array($rows) ) : ?>
  <dl class="faq">
    <?php foreach ( $rows as $row ) : ?>
      <?php
      $q = '';
      $a = '';
      if ( isset($row['question']) ) {
          $q = $row['question'];
      }
      if ( isset($row['answer']) ) {
          $a = $row['answer'];
      }
      if ( ! empty($q) || ! empty($a) ) : ?>
        <div class="faq__item">
          <?php if ( ! empty($q) ) : ?>
            <dt class="faq__q"><?php echo esc_html($q); ?></dt>
          <?php endif; ?>
          <?php if ( ! empty($a) ) : ?>
            <dd class="faq__a"><?php echo wp_kses_post($a); ?></dd>
          <?php endif; ?>
        </div>
      <?php endif; ?>
    <?php endforeach; ?>
  </dl>
<?php endif; ?>

<?php
$groups = rwmb_meta( 'your_group_id' );
if ( ! empty( $groups ) && is_array( $groups ) ) :
    foreach ( array_reverse( $groups ) as $group ) :
?>
    <div class="item">
        <h4><?php echo esc_html( $group['title'] ?? '' ); ?></h4>
        <p><?php echo nl2br( esc_html( $group['desc'] ?? '' ) ); ?></p>
    </div>
<?php
    endforeach;
endif;
?>

<?php
$related = rwmb_get_value('related_posts'); // Return: post IDs を想定
$ids = [];

if ( ! empty($related) && is_array($related) ) {
    foreach ( $related as $id ) {
        if ( ! empty($id) ) {
            $ids[] = (int) $id;
        }
    }
}

if ( ! empty($ids) ) {
    $q = new WP_Query([
        'post__in'            => $ids,
        'orderby'             => 'post__in', // 選択順を維持
        'ignore_sticky_posts' => true,
    ]);

    if ( $q->have_posts() ) {
        echo '<ul class="related">';
        while ( $q->have_posts() ) {
            $q->the_post();
            echo '<li><a href="' . esc_url(get_permalink()) . '">' . esc_html(get_the_title()) . '</a></li>';
        }
        echo '</ul>';
        wp_reset_postdata();
    }
}

<?php
// タームページ内でタームIDを取得して読む例
$term = get_queried_object();
if ( isset($term->term_id) ) {
    $term_id = (int) $term->term_id;
    $note = rwmb_get_term_meta($term_id, 'term_note', ['object_type' => 'term']);

    if ( ! empty($note) ) {
        echo '<div class="term-note">' . wp_kses_post($note) . '</div>';
    }
}

<?php echo do_shortcode( rwmb_meta( 'フィールドID' ) ); ?>

<?php
  $value = rwmb_meta( 'value' );
  if ( ! empty( $value ) ) :
?>
  <?php echo $value; ?>
<?php endif; ?>