arkdaşlar bi hata daha var yardım olun lütfen

burda botla veriyi çekiyorum ve igbitti.php de kaydetmeye çalışıyorum

<?php
include("db.php");
$id = $_GET["id"];
        $v = mysql_fetch_array(mysql_query("SELECT * FROM videolar WHERE id='$id'"));
        $resim= $v['resim'];
        $katid= $v['katid'];


    echo "<form action='igbitti.php' method='POST'>

<div align='center'>
    <table border='0' cellpadding='0' cellspacing='0' width='67%' height='40' bordercolorlight='#D6D6D6' id='table1'>
        <tr>
            <td height='19'>
            <p align='right'><font color='#FF00FF'><b>Resim Url Si</b></font></td>
            <td height='19' width='8' align='center'>:</td>
            <td height='19' width='339'>
            <input type='text' name='resim' size='54' value='$resim'></td>
        </tr>
        <tr>
            <td>
            <p align='right'><font color='#FF00FF'><b>Kategorisi</b></font></td>
            <td width='8' align='center'>:</td>
            <td width='339'><select name='katid'></form> ";

        include("db.php");
$kategoriler=mysql_query("SELECT * FROM kategoriler");
while($a=mysql_fetch_array($kategoriler)){
$id=$a['id'];
$katbaslik=$a['katbaslik'];
echo "<option value='$id'>$katbaslik</option>";
echo "
?></select></td>
        </tr>
    </table>
    <div align='center'>
        <table border='0' cellpadding='0' cellspacing='0' width='67%' height='24' bordercolorlight='#D6D6D6' id='table2'>
            <tr>
                <td>
                <p align='center'>
                <input type='hidden' name='id' value='$id'>
                <input type='submit' value='güncelle' name='guncelle'></td>
            </tr>
        </table>
    </div>
    </div>
</form></form>
";
}

?>

burdada igbittti.php var ama kaydet diyorum olmuyor hata var diyor

<?php

include("db.php");

$id = $_POST['id'];
$resim = $_POST['resim'];
$katid = $_POST['katid'];


	$guncelle = mysql_query("UPDATE videolar SET resim='$resim' katid='$katid' WHERE id='$id'");
	
	if($guncelle){
	echo "<center>Güncellendi</center>";
	header("refresh: 0; url=basarili.php");
	
	}else{
	echo "<center>HATA ! <BR>Güncellenemedi</center>";
	header("refresh: 2; url=hata.php");

	}
?>

hata da ise şöyle bir hata diyor

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'katid='2' WHERE id='2'' at line 1

hadi nolur yardım edin