how can i change custom values column?

I need to change Custom Values in Ads module

I need to devide one  column with all values in 2 columns

how can i change it in code?

 bxBaseForm.php :

 <tr $sTrAttrs>
                    <td class="caption">
                       $sRequired
                        $sCaption
                    </td>
                 
                    <td class="value$sClassAdd">
                        <div class="clear_both"></div>
                       $sCaption
                        $sButtonAdd
                        $sInfoIcon
                        $sErrorIcon
                        $sInputCodeExtra
                        <div class="clear_both"></div>
                    </td>
                </tr>

Custom values (block)

____________________

Country:

City:

Price:

Address:

Zip:

Number:

i want it to look like this:

Custom values (block)

____________________

Country:  blabla            Address:

City:                              Zip:

Price:                            Number:

thanks ))