$('.sb-media-btn').click(function() {
        var send_attachment_bkp = wp.media.editor.send.attachment;
        var id = $(this).attr('rel-id');

        wp.media.editor.send.attachment = function(props, attachment) {
            $('#url_' + id).val(attachment.url);
            wp.media.editor.send.attachment = send_attachment_bkp;
        }

        wp.media.editor.open($(this));

        return false;
    });