you write some code, that's how?
query your database to get the colum.
$query = "SELECT column_name FROM table_name";
Send the query to your database.
Run the results in a while loop
<select name="listname">
<?php
while($row = $fetch_array($result)){
print "<option value=\"".$row['column_name']."\">".$row['column_name']."</option>\n";
}//end while
?>
</select>
and there you go.
I usually write a function to grab specific data and output the menu. much easier to re-use.