how can i pagenav for get_categories

this is my code:

<?php
$cat = get_query_var(‘cat’);
$args = array(
‘child_of’ => $cat,
‘orderby’ => ‘name’,
‘order’ => ‘ASC’,
‘number’ => ’10’,
);
$categories = get_categories($args);
foreach($categories as $category) {
echo ……….
}
?>

<?php wp_pagenavi(); ?>

i want show only 10 categories per page, i used <?php wp_pagenavi(); ?> ,but it is not working. please help me.