<?php
    $foo = array("designer", "brand", "category", "category", "designer");
    $bar = array("first designer", "shirt", "cloth1", "cloth2", "second designer");
    $baz = array();
    
    for ($i = 0; $i < sizeof($foo); $i++) {
        $baz[$foo[$i]][] = $bar[$i];
    }
    
    foreach ($baz as $key=>$values) {
        echo '<div id="' . $key . '">
';
        foreach ($values as $value) {
            echo '    ' . $value . '<br />
';
        }
        echo '</div>
';
    }
?>

<div id="designer">
    first designer<br />
    second designer<br />
</div>
<div id="brand">
    shirt<br />
</div>
<div id="category">
    cloth1<br />
    cloth2<br />
</div>