<style>
	.wraall02 div,.wraall02 strong	{margin:10px;padding:10px;}
	.wraall02 .div01	{border:dotted 1px red;}
	.wraall02 .div02	{border:dotted 1px blue;}
	.wraall02 .div03	{border:dotted 1px green;}
</style>
<script>
	$(function(){
		$('.wraall02 .div01,.wraall02 strong').wrapAll('<div class="div03"></div>');
	});
</script>
<div class="wraall02">
	<div class="div01">要素１</div>
	<strong>要素3</strong>
	<div class="div02">要素2</div>
	<div class="div01">要素１</div>
	<strong>要素3</strong>
	<div class="div02">要素2</div>
	<div class="div01">要素１</div>
	<strong>要素3</strong>
	<div class="div02">要素2</div>
</div>