WP - CPT List Shortcode

gistfile1

function rgp_listing_list_shortcode() {
    $loop = new WP_Query(
               array(
                'post_type' => 'listing',
                'orderby' => '_rgp_listing_status'
            )
    );

    $output_active = '<ul class="rgp_active_list">';
    $output_sold = '<ul class="rgp_sold_list">';

    if ( $loop->have_posts() ) {


        while( $loop->have_posts() ) {
            $loop->the_post();
            $meta = get_post_meta(get_the_id(), '');
            $status = $meta['_rgp_listing_status'][0];

            if ('2' == $meta['_rgp_listing_status'][0] )
            {
                $output_sold .= '
                    <li>
                        sold ' . get_the_title() . '
                    </li>';
            }
            else
            {
                $output_active .= '
                    <li>
                        active ' . get_the_title() . '
                    </li>';
            }
        }

        $output = $output_active . $output_sold;
        return $output;

    }
    else {
        return 'There are no listings.';
    }

}
add_shortcode('rgp_listings', 'rgp_listing_list_shortcode');