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function exibe_menu($atts){
  $a = shortcode_atts( array(
    'nome' => '',
	), $atts );
  ob_start();

  wp_nav_menu(array(
      'menu' => $a['nome'],    
      'menu_class' => 'footer-menu',
      /* 'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>', */
  ) );

  return ob_get_clean();
}
add_shortcode('exibe-menu', 'exibe_menu');