$('.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;       
	});