Overriding table for ckeditor plugin mybb

cktableoverride.php

<?php
//Disallow direct Initialization for extra security.

if(!defined("IN_MYBB"))
{
    die("You Cannot Access This File Directly. Please Make Sure IN_MYBB Is Defined.");
}

// Information
function cktableoverride_info()
{
return array(
        "name"  => "Override CKeditor table",
        "description"=> "A plugin to override the table html output from ckeditor",
        "website"        => "http://stackoverflow.com/questions/32663683/ckeditor-change-table-style",
        "author"        => "Niels Swimberghe",
        "authorsite"    => "http://www.sniels.com",
        "version"        => "1.0",
        "guid"             => ""
    );
}

// Activate
function cktableoverride_activate() {
global $db;

$cktableoverride_group = array(
        'gid'    => 'NULL',
        'name'  => 'cktableoverride',
        'title'      => 'My First Plugin',
        'description'    => 'Settings For My First Plugin',
        'disporder'    => "1",
        'isdefault'  => "0",
    );
$db->insert_query('settinggroups', $cktableoverride_group);
 $gid = $db->insert_id();

$cktableoverride_setting = array(
        'sid'            => 'NULL',
        'name'        => 'cktableoverride_enable',
        'title'            => 'Do you want to enable My First Plugin?',
        'description'    => 'If you set this option to yes, this plugin be active on your board.',
        'optionscode'    => 'yesno',
        'value'        => '1',
        'disporder'        => 1,
        'gid'            => intval($gid),
    );
$db->insert_query('settings', $cktableoverride_setting);
  rebuild_settings();
}

// Deactivate
function cktableoverride_deactivate()
  {
  global $db;
 $db->query("DELETE FROM ".TABLE_PREFIX."settings WHERE name IN ('cktableoverride_enable')");
    $db->query("DELETE FROM ".TABLE_PREFIX."settinggroups WHERE name='cktableoverride'");
rebuild_settings();
 }


$plugins->add_hook('parse_message','custom_ckeditor_parser',9);
function custom_ckeditor_parser($m){

	// Table:
	while(preg_match("#\[table\](.*?)\[/table\]#si", $m, $m1))
	{
		while(preg_match("#\[tr\](.*?)\[/tr\]#si", $m1[1], $m2))
		{
			$m2[1] = preg_replace("#\[td\](.*?)\[/td\]#si", '<td>$1</td>', $m2[1]);
			$m1[1] = str_replace($m2[0], '<tr>'.$m2[1].'</tr>', $m1[1]);
		}
		$m = str_replace($m1[0], '<table class="ckeditor_table">'.$m1[1].'</table>', $m);
	}

	return $m;
}