Drupal: tabbed block with jQuery UI

gistfile1.php

<?php

function my_module_my_tabbed_block() {

	// Block title
	$block['subject'] = t("My tabbed block");

  // Tabs.
  $block['nav'] = array(
    '#theme' => 'item_list',
    '#items' => array(
      l(t('Item 1'), '', array('fragment' => 'item-1', 'external' => TRUE)),
      l(t('Item 2'), '', array('fragment' => 'item-2', 'external' => TRUE)),
      l(t('Item 3'), '', array('fragment' => 'item-3', 'external' => TRUE)),
    ),
    '#attributes' => array('class' => array('tabs'))
  );

  // Content.
  $block['item1'] = array(
    '#prefix' => '<div id="item-1">',
    '#suffix' => '</div>',
    'content' => array(
      '#type' => 'markup',
      '#markup' => "my content 1",
    ),
  );
  $block['item2'] = array(
    '#prefix' => '<div id="item-2">',
    '#suffix' => '</div>',
    'content' => array(
      '#type' => 'markup',
      '#markup' => "my content 2",
    ),
  );
  $block['item3'] = array(
    '#prefix' => '<div id="item-3">',
    '#suffix' => '</div>',
    'content' => array(
      '#type' => 'markup',
      '#markup' => "my content 3",
    ),
  );

  // jQuery UI tabs library
  $block['#attached'] = array(
    'library' => array(
      array('system', 'ui.tabs')
    ),
    'js' => array('
      jQuery(document).ready(function(){
        jQuery("#block-my-module-my-tabbed-block > .content").tabs();
      });' => array('type' => 'inline')
    )
  );

  return $block;
}