ok, ho risolto da solo. se a qualcuno può interessare

while($fetch = $db->fetch_array($result)){
$sMenu = '<table width="140" align="center" border=0>';
$sMenu .='<tr><td class="menuf" align="left">'.$fetch['nome'].'</td></tr>';
$sMenu .='<tr><td class="article_news">'.addslashes($fetch['descbreve']).'</td></tr><tr height="5"><td></td></tr>';
if($fetch = $db->fetch_array($result)){
$sMenu .='<tr><td class="menuf" align="left">'.$fetch['nome'].'</td></tr>';
$sMenu .='<tr><td class="article_news">'.addslashes($fetch['descbreve']).'</td></tr><tr height="5"><td></td></tr>';
}
$sMenu .="</table>";
echo "myScrollerThing.msgArray[".$i."] = '".$sMenu."';";
$i++;
}