Just modify like this below
function cbtitle($params=false)
{
global $cbsubtitle;
$sub_sep = $params[\'sub_sep\'];
if(!$sub_sep)
$sub_sep = \'-\';
//Getting Subtitle
if(!$cbsubtitle)
//echo \" $sub_sep \".SLOGAN;
echo SLOGAN.\" $sub_sep \";
else
//echo \" $sub_sep \".$cbsubtitle;
echo $cbsubtitle.\" $sub_sep \";
//echo \" \".SUBTITLE;
echo TITLE;
}