ElementStacks

HTML

<script src="http://highcharts.com/js/testing.js"></script>
<button id="b0">Set new data and categories</button>
<div id="container" style="height: 200px"></div>
<div id="container2" style="height: 200px"></div>
<script src="http://code.highcharts.com/master/highcharts.src.js"></script>

JavaScript

var chart = new Highcharts.Chart({
    chart: {
        renderTo: 'container',
        height: 200
    },
    xAxis: {
        categories: ['Jan', 'Feb']
    },
    series: [{
        type: 'column',
        data: [29.9, 71.5]}]
});
var chart2 = new Highcharts.Chart({
    chart: {
        renderTo: 'container2',
        height: 200
    },
    xAxis: {
        categories: ['Jan', 'Feb','Jan', 'Feb','Jan', 'Feb'],
        minRange: 3
    },
    series: [{
        type: 'column',
        data: [29.9, 71.5,29.9, 71.5,29.9, 71.5]}]
});

$('#b0').click(function() {
    chart.xAxis[0].setCategories(['a','b','c']);
    chart.series[0].setData([11,22,55]);
    chart2.xAxis[0].setCategories(['a','b','c']);
    chart2.series[0].setData([11,22,55]);
});