I have a website where members can input text using a limited subset of HTML. When a page is displayed that contains a user's text, if they have any unclosed tags, the formatting "bleeds" across into the next area. For example, if the user entered:

Hi, my name is <b>John

Then, the rest of the page will be bold.

Ideally, there'd be someting I could do that would be this simple:

<div contained>Hi, my name is <b>John</div>

And no tags could bleed out of that div. Assuming there isn't anything this simple, how would I accomplish a similar effect? Or, is there something this easy?

Importantly, I do not want to validate the user's input and return an error if they have unclosed tags, since I want to provide the "easiest" user interface possible for my users.

Thanks!