<?php
$result = mysql_query("
SELECT
*
FROM
some_table
ORDER BY
company,
category,
brand
")
or trigger_error('Query failed in '. __FILE__ .
' on line '. __LINE__ .'. '. mysql_error(), E_USER_ERROR);
if (mysql_num_rows($result)) {
$companies = array();
while ($row = mysql_fetch_assoc($result)) {
$companies[$row['company']][$row['category']][] = $row['brand'];
}
foreach ($companies AS $company => $categories) {
echo '<h2>'. htmlentities($company, ENT_COMPAT, 'UTF-8') .'</h2>';
echo '<ul>';
foreach ($categories AS $category => $brands) {
echo '<li>'. htmlentities($category, ENT_COMPAT, 'UTF-8');
foreach ($brands AS $brand) {
echo '<br><em>'. htmlentities($brand, ENT_COMPAT, 'UTF-8') .'</em>';
}
echo '<br> </li>';
}
echo '</ul>';
}
}
jsbin