gistfile1.txt

    browser.elements( "css selector",'div.installs_container .c3-legend-item', function (result) {
      async.map(
        result.value,
        function (v,callback) {
          browser.elementIdText(v['ELEMENT'],function (result){
              callback(null,result);
            });
        },
        function (err, results) {
          console.log(results.map(function (v){return v.value;}));
          browser.end();
        });
    });