var a = document.createElementNS('http://www.w3.org/2000/svg', 'a');

    $( "g[id$='-hover-text']" ).wrap(function () {
        var ohnehovertext=$(this).attr("id").split("-hover-text");
        a.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', ohnehovertext[0]);
        return a;
    });