Output radio button value in repeatable group

Hey Folks,

I’m trying to output a radio button value in a repeated group, but I can’t make it go. I’m sure it’s user error, but I need some help. I can output a non-grouped radio button, but don’t know how to get a group radio button value. Code below.

// CMB2 - Homepage Custom Content
add_action( 'cmb2_admin_init', 'hp_mb' );
/**
 * Define the metabox and field configurations.
 */
function hp_mb() {

    // Start with an underscore to hide fields from custom fields list
    $prefix = '_bto_';

    /**
     * Initiate the metabox
     */
    $cmb = new_cmb2_box( array(
        'id'            => 'hp_custom_content',
        'title'         => __( 'Homepage Custom Content', 'cmb2' ),
        'object_types' => array( 'page' ), // post type
        'show_on'       => array('key' => 'id', 'value' => array(5)),
        'context'       => 'normal',
        'priority'      => 'high',
        'show_names'    => true, // Show field names on the left
    ) );

// Learn More
    $group_field_id = $cmb->add_field(array(
        'id'        => 'learn_more_group',
        'type'      => 'group',
        'options'   => array(
            'group_title'   => _('Learn More Item {#}'),
            'add_button'    => _('Add another item'),
            'remove_button' => _('Remove item'),
            'sortable'      => true,
            ),
        ));

    $cmb->add_group_field( $group_field_id, array(
        'name'              => 'Is this a wide image, narrow image or video?',
        'id'                => 'img_title',
        'desc'              => '<b>If it is a video, please skip to the video section</b>.', 
        'type'              => 'radio',
        'show_option_none'  => false,
        'options'           => array(
            'wide' => 'Wide Image',
            'narrow' => 'Narrow Image',
            'video' => 'Video',
            ),
        ));
}

Output

<?php $boxes = get_post_meta( get_the_ID(), 'learn_more_group', true );
          foreach ( (array) $boxes as $box => $entry ) {

              $img = $option = '';

              if ( isset( $entry['img_title'] ) ) {
                  $option = $entry['img_title'];
              }

              if ( isset( $entry['item_img'] ) ) {
                  $img = wp_get_attachment_image( $entry['item_img_id'], 'share-pic', null, array(
                      'class' => 'large',
                  ) );
              }

              echo $option;
              echo $img; 
              } ?>

Thanks,
Adam