Here is an example to load data into form that contains ckeditor.
<form id="f1" novalidate>
<input name="name">
<input name="age">
<textarea id="message" name="message" class="ckeditor"></textarea>
</form>
Now call the code below to load data.
var data = {
name:'name2',
age:30,
message:'message2'
};
$('#f1').form('load', data);
CKEDITOR.instances.message.setData(data.message);