$Item->categories( array(
     'before'          => ' ',
     'after'           => ' ',
     'include_main'    => true,
     'include_other'   => true,
     'include_external'=> true,
     'before_main'     => '',       // string fo display before the MAIN category,
     'after_main'      => '',       // string fo display after the MAIN category
     'before_other'    => '',       // string fo display before OTHER categories
     'after_other'     => '',       // string fo display after OTHER categories
     'before_external' => '<em>',   // string fo display before EXTERNAL categories
     'after_external'  => '</em>',  // string fo display after EXTERNAL categories,
     'separator'       => '#',
     'link_categories' => true,
     'link_title'      => '#',
     'format'          => 'htmlbody',
  ) );