<?php

$boxes = array(1,2,3,4,5);

foreach($boxes as $box):


    $category_id = ot_get_option("box-home-categoria-{$box}");
    $category_query = new WP_Query (
        array(
                'posts_pr_page' =>      5,
                'cat'               =>  $category_id,
        'nopaging'  => true,
        )
    );

    /** ***/

endforeach;
?>