problem s update v Php

$Conn = mysql_connect($server, $uzivatel, $heslo) or
	die($errorMsg[1]."<br>ErrorNo. ".mysql_errno()."<br>MySQL said: ".mysql_error());
mysql_select_db($databaza, $Conn) or
	die($errorMsg[2]."<br>ErrorNo. ".mysql_errno()."<br>MySQL said: ".mysql_error());
   mysql_query("SET NAMES 'cp1250';"); //nebo 'latin2' nebo 'utf8'
if ($_GET['ID']==0){
	$SQLText="INSERT INTO menu (Nazov,Popis,ZarovnanieP,FarbaPO,FarbaPI,ClickP,VelkostP,HrubkaP,TypP,FarbaB0,FarbaBI,Image,Url,Target) VALUES ('$Nazov','$Popis','ZarovnanieP','$FarbaPO','$FarbaPI','$ClickP','$VelkostP','$HrubkaP','$TypP','$FarbaBO','$FarbaBI','$Image','$Url','$Target')";
    	mysql_query($SQLText,$Conn);         }
else { $result = mysql_query("SHOW COLUMNS FROM menu ");
 $arrExclude = array('Field');
 $result = mysql_query("SHOW COLUMNS FROM menu") or die("mysql error");
 $numColumns = mysql_num_rows($result);
$x = 0;
while ($x < $numColumns)
{
    $colname = mysql_fetch_row($result);
    if(!in_array($colname, $arrExclude)) {
        $col[$colname[0]] = $colname[0];
    }
    $x++;
}


$col2= array_diff($col,$arrExclude); //removes arrExclude from the created array $col
foreach ($col2 as $h)
{
$retezec.=$h."='$".$h."',";
}
$retezec = substr ($retezec, 0, -1);

// $feri= "UPDATE menu SET $retezec WHERE ID='$ID'";
 //echo "$feri";
mysql_query (sprintf("UPDATE menu SET %s WHERE ID='$ID'", $retezec));
}