// Nie działa
function display_review_position_fields( $f_args, $f ) {
  $name    = $f_args['name'];
  $desc    = $f_args['desc'];
  $id      = $f_args['id'];
  $options = display_review_position_options();
  $value   = $f->escaped_value();
  $post_id = $f->object_id;
  ?>
<div class="cmb-row cmb-type-select cmb2-id-review-type" data-fieldtype="select">
<div class="cmb-th">
<label for="<?=$id?>"><?=$name?></label>
</div>
  <div class="cmb-td">
    <select class="cmb2_select" name="<?=$name?>" id="<?=$id?>" data-hash="1gnotga895ig">
      <?php foreach( $options as $k => $v ) : ?>
      <option value="<?=$k?>"<?=$k==$value ? ' selected="selected"' : ''?>><?=$v?></option>
      <?php endforeach; ?>
    </select>
    <p class="cmb2-metabox-description"><?=$desc?></p>
    <p class="review_shortcode"<?=$value != 'custom' ? 'style="display: none;"' : ''?>>
      <b>Wklej ten shortcode w dowolne miejsce w treści wpisu:</b><br>
      <input type="text" value='<?='[review id="'.$post_id.'"]'?>' disabled>
    </p>
    <script>
        jQuery(function ($) {
            $('#<?=$id?>').change(function(){
            if ( $(this).val() == 'custom' ) {
                $('.review_shortcode').fadeIn(200);
            } else {
                $('.review_shortcode').fadeOut(200);
            }
        });
    });
    </script>
  </div>
</div>
<?php
}

// Działa

function display_review_position_fields( $f_args, $f ) {
  $name    = $f_args['name'];
  $desc    = $f_args['desc'];
  $id      = $f_args['id'];
  $options = display_review_position_options();
  $value   = $f->escaped_value();
  $post_id = $f->object_id;
?>
<div class="cmb-row cmb-type-select cmb2-id-review-type" data-fieldtype="select">
<div class="cmb-th">
<label for="<?=$id?>"><?=$name?></label>
</div>
  <div class="cmb-td">
    <select class="cmb2_select" name="<?=$id?>" id="<?=$id?>" data-hash="1gnotga895ig">
      <?php foreach( $options as $k => $v ) : ?>
      <option value="<?=$k?>"<?=$k==$value ? ' selected="selected"' : ''?>><?=$v?></option>
      <?php endforeach; ?>
    </select>
    <p class="cmb2-metabox-description"><?=$desc?></p>
    <p class="review_shortcode"<?=$value != 'custom' ? 'style="display: none;"' : ''?>><b>Wklej ten shortcode w dowolne miejsce w treści wpisu:</b><br><?="[review id=\"$post_id\"]"?></p>
    <script>
      $('#<?=$id?>').change(function(){
        if ( $(this).val() == 'custom' ) {
          $('.review_shortcode').fadeIn(0);
        } else {
          $('.review_shortcode').fadeOut(0);
        }
      });
    </script>

  </div>
</div>
<?php
}