caption with blockquote

//change image caption output html from <p> to <blockquote> //
add_filter('img_caption_shortcode', 'img_caption_shortcode_blockquote', 10, 3);

function img_caption_shortcode_blockquote($empty,$att = null,$cont= null) {

extract(shortcode_atts(array(
        'id'    => '',
        'align' => 'alignnone',
        'width' => '',
        'caption' => ''
    ), $att));

    if ( 1 > (int) $width || empty($caption) )
        return $cont;

    if ( $id ) $id = 'id="' . esc_attr($id) . '" ';

    return '<div ' . $id . 'class="wp-caption ' . esc_attr($align) . '" style="width: ' . (10 + (int) $width) . 'px">'
    . do_shortcode( $cont ) . '<blockquote class="wp-caption-text">' . $caption . '</blockquote></div>';
}