Formatting using eregi_replace()

[jacrewq]

I have lines similar to code below:

<td>Word1<td><a href='1lnk'>Word2</a><td>Word3
<td>Word21<td><a href='2lnk'>Word22</a><td>Word23

I'd like to make them look like that lines:

Word1,Word2,Word3
Word21,Word22,Word23

What would my eregi_replace pattern and everything be?

Thanks a lot!

[the_Igel]

If you're sure about this format, you can do it without patterns:

foreach ($line_of_text as $line)
{
$line = str_replace('><', '>,<', $line);
$line = strip_tags($line);
}