Table Library: Need Help for proper solution => How to add CSS for each column

[eluser]huzzel[/eluser]
Hi,

i need to set a column to 100% so i changed the core library.

Code:

foreach($this->heading as $heading)
            {
                $out .= $this->template['heading_cell_start'];
                $out .= $heading;
                $out .= $this->template['heading_cell_end'];
            }

Code:

foreach($this->heading as $key => $heading)
            {
                $out .= '<th id="th_' . $key . '">';
                $out .= $heading;
                $out .= $this->template['heading_cell_end'];
            }

How can i use this modification without changeing the corelibrary ?