Multiple values with List

Multiple values with List

I've created a list of 4 product categories. It's working fine and passing
all the values to the next page.
Code is:
echo "<tr><td>Product Category* </td>";
echo "<td>";
echo "<select size=\"1\" name=\"pc\" id=\"pc\">";
echo "<option value=\"0\">Product Category</options>";
echo "<option value=\"Hair\">Hair</options>";
echo "<option value=\"Skin\">Skin</options>";
echo "<option value=\"Nail\">Nail</options>";
echo "<option value=\"Eyes\">Eyes</options>";
echo "</select></td>";
I want this list to transfer 4 more values (product category IDs) with the
current values to the next page also.
for Hair ID is: 77
for Skin ID is: 88
for Nail ID is: 99
for Eyes ID is: 66