[garrynewman]

Ok, finally.. for anyone wanting tags like [sql]code[/sql] and [lua]code[/lua].. here's an example for Lua..

if (!function_exists('handle_bbcode_lua'))
{
    function handle_bbcode_lua(&$parser, $code, $type)
    {
        return handle_bbcode_highlight( $parser, $code, 'lua' );
    }
}

$this->tag_list['no_option']['lua'] = array(
    'callback' => 'handle_external',
    'strip_empty' => true,
    'stop_parse' => true,
    'disable_smilies' => true,
    'disable_wordwrap' => true,
    'strip_space_after' => 1,
    'external_callback' => 'handle_bbcode_lua'
);

Just add it near the bottom of the bbcode_create hook.