i passed these value from a link to page A

PHP Code:
and then from page A i passed these values to page B.

PHP Code:
<a href=\"admin.php?action=writeRe&cat_ID=$category_ID\"><b>Write a review</b></a> 
i did put hidden field but i can't get the cat_ID in page B. in the url, the cat_ID do have value but when i have this sql query:

PHP Code:
$sql "SELECT * FROM cat_review WHERE cat_ID = '$cat_ID'";
$result mysql_query($sql);

$record mysql_fetch_array($result); 
cat_ID don't have any value. wat is wrong? pls help..