PHP Preg_replace help needed

I am trying to replace some html in php with preg_replace and I don't seem to get the regex fine, because I always screw it up.

Could you please help me with it ?

I have the following:

<ol><li>text</li><li>text</li></ol>

<ol>&开发者_如何学Golt;li><ul><li>text</li></ul></li></ol>

And I want to insert a <span></span> right after <li> and place the text in <p>. I must note that I don't want the <li> inside the <ul> to be affected.

Thank you !

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Rather than trying to write a single regexp to handle this (I think it might be possible to do it with a look-behind type match) it'd be easiest to:

• find each <ol> with preg_match_all()
• iterate through each <li> in the results ensuring that it's not wrapped in a <ul>

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I recommend this http://code.google.com/p/phpquery/

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Using a regexp for this is a recipe for bugs.

Parse the html so as to be able to manipulate it as objects. There are plenty of libraries to do so: DOM extension, SimpleXML, phpquery, etc. Then manipulate it as you need.