#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "<(p|span).*?>"
Local $sString = "<td style="blabla">" & @CRLF & _
" <p style="blabla">" & @CRLF & _
" tekst <span style=blabla">more text</span>" & @CRLF & _
" </p>" & @CRLF & _
" </td>"
Local $sSubst = "<\1>"
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm