<div id="container2"></div>

<script>

var labels = ['First', 'Second', 'Third', 'Fourth', 'Fifth', 'Sixth']

Highcharts.chart('container2', {

  yAxis: {
    opposite: true,
    labels: {
      formatter: function() {
        return labels[this.pos - 1]
      }
    }
  },

  series: [{
    data: [3, 2, 4, 5]
  }]

});

</script>