<?php
    $all = array();
    foreach ($NewCategories as $Cat) {
        $all[] = $Cat['id'];
    }

$presets = array(
'Sæt 1' => json_encode(array(90,91,92)),
'Sæt 2' => json_encode(array(85,86,87)),
'Sæt 3' => json_encode(array(78,79,80)),
'Alle' => json_encode($all)
);
?>
    <table>
        <tr>
            <?php
                foreach($presets as $name => $cats) {
                    echo "<td>";
                    echo "<a href='#' onclick=\"catPresets('". $cats ."');return false;\"><div width='100%' height='100%' style='text-align: center;'>$name</div></a>";
                    echo "</td>";
                }
            ?>
        </tr>
    </table>