Database results into 3 equal columns - php

Question

I've got a very minor problem but it's one I'd like to work out, so I'm looking for suggestions.
I'm using the following PHP code to echo the data from an array.
$array = array();
$rsa = $wpdb->get_results("SELECT * from wp_letter ORDER BY l_name ASC");
foreach($rsa as $rrr)
{
array_push($array,$rrr->l_name);
}
$temp = 0;
foreach($array as $as)
{
$temp = 0;
$query = $wpdb->get_results("SELECT * FROM wp_term_taxonomy AS tx, wp_terms AS trm WHERE taxonomy = 'category' AND trm.term_id = tx.term_id AND name like '".$as."_%' ORDER BY name ASC");
foreach($query as $row1)
{
if($temp == 0)
{
echo '<h4>'. $as.'</h4>';
$temp = 1;
}
?>
<a class="anchor" href="<?php echo esc_url(get_category_link($row1->term_id)); ?>"><?php echo $row1->name;?></a><br/>
<?php }
} ?>

Answer 1

Just add the LIMIT 3 into your Query, e.g.
SELECT * from wp_letter LIMIT 3 ORDER BY l_name ASC;

Answer 2

You could either use some crap like (for example):
$query = [1,2,3,4,5,6,7,8,9,10,11,12,13,14];
$results = ['1col' => [], '2col' => [], '3col' => []];
foreach($query as $key => $result) {
if (($key+1) % 2 === 0 && !(($key + 1) % 3 === 0)) {
$results['2col'][] = $result;
} elseif (($key+1) % 3 === 0) {
$results['3col'][] = $result;
} else {
$results['1col'][] = $result;
}
}
OR just smth like this:
$results = array_chunk($query, ceil(count($query)/3));
Links:
array_chunk
ceil