function pc_dropdown() {

$query="SELECT name,id FROM category WHERE site = 1";
$result = mysql_query ($query);
echo "<select name=cattag_1_1 value='' onchange=showUser(this.value)>CatTag 1</option>";
while($nt=mysql_fetch_array($result)){
echo "<option value=$nt[id]>$nt[name]</option>";
}
echo "</select>";
}