在正则表达式中分割html标记

I have a string as such:

我有一个字符串:

<p>
Lorem ipsum dolor sit amet, consectetur adipiscing elit.<br>
Mauris non rutrum velit. Morbi sed turpis in urna fermentum sodales.<br>
Proin aliquet nisi a congue egestas.
</p>
<p>
Lorem