function mf_metabox_content( $post, $metabox ) {
    global $mf_domain, $mf_post_values;

    //Getting the custom fields for this metabox
    $custom_fields = $this->get_custom_fields_by_group($metabox['args']['group_info']['id']);
    $group_id = $metabox['args']['group_info']['id'];
    //default markup
    ?>
    <div class="mf-group-wrapper group-<?php print $group_id;?>" id="mf_group-<?php print $group_id; ?>" >
      <!-- grupos se puede repetir -->
      <?php
        $extraclass = "";
        if( $metabox['args']['group_info']['duplicated'] ) {
          $extraclass = "mf_duplicate_group";
          $repeated_groups = $this->mf_get_duplicated_groups( $post->ID, $group_id );
        } else {
          $repeated_groups = 1;
        }

        for( $group_index = 1; $group_index <= $repeated_groups; $group_index++ ){
          $only = ($repeated_groups == 1)? TRUE : FALSE;
          $this->mf_draw_group($metabox,$extraclass,$group_index,$custom_fields,$mf_post_values,$only);
        }
        printf('<input value="%d" id="mf_group_counter_%d" style="display:none" >',$repeated_groups,$group_id);
      ?>
      <!-- fin del grupo -->
    </div>
  <?php
  }