wordpress smartslider3 to gallery

    function pippin_get_image_id($image_url) {
        global $wpdb;
        $attachment = $wpdb->get_col($wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE guid='%s';", $image_url ));
        return $attachment[0];
    }
    // [bartag foo="foo-value"]
    function bartag_func( $atts ) {
        $a = shortcode_atts( array(
            'foo' => 'something',
            'bar' => 'something else',
        ), $atts );
        global $wpdb, $strreplace;
        $attachment = $wpdb->get_col($wpdb->prepare("SELECT thumbnail FROM groznyi.wp_nextend2_smartslider3_slides WHERE slider=".$atts['slider'].";"  ));
        $str="";
        foreach ($attachment as &$value) {
            $str = $str.pippin_get_image_id(str_replace ("\$upload\$", "http://www4.sb-dc.ru/wp-content/uploads", $value)).",";
        }
        $strreplace='[gallery columns="4" link="file" ids='.$str.']';
        return '[gallery columns="4" link="file" ids='.$str.']';
    }
    add_shortcode( 'smartslider3', 'bartag_func' );
    $content = get_the_content ();
    the_content();
    do_shortcode($content);?>