axis label selection

HTML

<div id="container" style="height: 400px; width:600px"></div>
<script src="http://code.highcharts.com/highcharts.js"></script>

JavaScript

$(function () {
    $('#container').highcharts({
        chart: {
            type: 'column'
        },
        xAxis: {
            categories: ['January 2014', 'February 2014', 'March 2014', 'April 2014', 'May 2014', 'June 2014', 'July 2014', 'August 2014', 'September 2014', 'October 2014', 'November 2014', 'December 2014'],
          
        },
        series: [{
            data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
        }]
    });
});