Remove all attributes from HTML tags using TextWranlger:

<tr(.|\n)*?>

Change the <tr> to something else and it will look only for that particular tag.

Using preg_match_all or preg_replace regular expressions.

Empty Tags:

$empty_tags = "/<[^\/>]*>([\s]?)*<\/[^>]*>/";

Find the last <td> or <th> of a table (e.g. removing the last column of a table):

$last_td = "/<(?:td|th)[^>]*>.*?<\/(?:td|th)>\s+<\/tr>/i";

Find the first <td> or <th> of a table (e.g. removing the first column of a table):

$first_td = "/<tr>\s+<(?:td|th)[^>]*>.*?<\/(?:td|th)>\s+/i";

Split all the <td>’s into an array:

$splitats = "'<td>(.*?)</td>'si";

Find <td>’s with content that starts with “text”:

$regex_text = "/<\s*td.*?>text(.*)/";