var obj = {
'one' : '1',
'Tree' : 'bark',
'baseball' : 'cricket'
};
$.each(obj, function(key, value) {
$('<p />', {
text: key + ' : ' + value,
class: key
}).appendTo('div');
});
<div></div>
.one { color: red; }
.Tree { color: blue; }
.baseball{ color: green; }