Find an element and you can use '.text()' or '.html()' to update its value. Here is an example shows how to do this.
<div id="foo" class="easyui-tabs" style="width:600px;height:300px">
<div title="Tab1">
<p><label id="l-A"></label></p>
<p><label id="l-B"></label></p>
<p><label id="l-C"></label></p>
</div>
</div>
<script type="text/javascript">
$(function(){
var data = {
A: 'Apple',
B: 'Banana',
C: 'Cherry'
};
for(var k in data){
var v = data[k];
$('#l-'+k).html(v);
}
});
</script>