To remove o:p in PDF from HTML

I have an auto-generated HTML file, as an output from a HTML template, which contains XML tags like o:p The HTML template has some formulae in it which uses the application's data and produces the HTML output. I use a PDF transformer which reads the html file and transforms the output to PDF. While doing so, it does not recognize the o:p tag and prints the same as it is. I understand from the microsoft site that these xml tags used in HTML are understood and translated only by MS-word and I guess non-MS applications like my PDF transformer will not recognize it. I tried removing the XML part from the source HTML template but still the HTML output file has the o:p tag in it. Here are the xml code in the source html template file...Can someone help?

<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">