Matching HTML tags

[pucara_faa]

Hi again!
I need to match HTML tags (when one tag opens and when it closes). If I have

<span class="css1">Some text</span>

<span class="css1">Some text</span>

To copy to clipboard, switch view to plain text mode 

It's very easy to match it. But I can't match them correctly when the following happens:

<span style="font-weight: bold">So<span style="color:#F00">me</span> text</span>

<span style="font-weight: bold">So<span style="color:#F00">me</span> text</span>

To copy to clipboard, switch view to plain text mode 

The first opened tag matchs the first closed tag, not the last one.

If someone can give me an example or tell me how to do it, I'll be really thanked.
Thanks in advanced.
I'm sorry for my poor English, I'm Argentinian

[Lykurg]

If it is only one nested tag you could use something like:

<[^>]+>([^<]*| NESTED )</[^>]+>

<[^>]+>([^<]*| NESTED )</[^>]+>

To copy to clipboard, switch view to plain text mode 

with NESTED like

<[^>]+>[^<]*</[^>]+>

<[^>]+>[^<]*</[^>]+>

To copy to clipboard, switch view to plain text mode 

So you get:

<[^>]+>([^<]*|<[^>]+>[^<]*</[^>]+>)</[^>]+>

<[^>]+>([^<]*|<[^>]+>[^<]*</[^>]+>)</[^>]+>

To copy to clipboard, switch view to plain text mode 

But that approach is not very save...

[pucara_faa]

Thank you very much for answering back!
I'm getting on the right way with the code you gave me. But, I always capture the same expression. How can I match another expression?
For example, in this string:

<span style="font-weight: bold">So<span style="color:#F00">me</span> text</span>

<span style="font-weight: bold">So<span style="color:#F00">me</span> text</span>

To copy to clipboard, switch view to plain text mode 

I always match

<span style="color:#F00">me</span>

<span style="color:#F00">me</span>

To copy to clipboard, switch view to plain text mode 

What if I want to match the first tag (I'm sorry, I'm newbie with this)
Again, thank you.

[Lykurg]

I am not sure what you really want to achieve but to match also the whole just put brackets at the front and at the end: (PaternToMatch)

[pucara_faa]

And what if I have two or more nested tags?