Set class for li and a in menu?

Question

Drupal

Hello.
I display the menu in the template like this:

print theme('links', array('links' => menu_navigation_links('menu-company'), 'attributes' => array('class'=> array('links', 'footer-nav footer__nav')) ));

The menu is displayed. Now we need to add a class for the 'li' and 'a' tags.
Tried like this in template.php

function mytheme_menu_link(array $variables) {
    $element = $variables['element'];
    $sub_menu = '';

    if ($element['#below']) {
        $sub_menu = drupal_render($element['#below']);
    }
    $element['#attributes']['class'][] = 'footer-nav__item';
    $output = l($element['#title'], $element['#href'], $element['#localized_options']);
    return '<li' . drupal_attributes($element['#attributes']) . '>' . $output . $sub_menu . "</li>\n";
}

But it didn't. Tried to debug this function, but to no avail. It feels like the function is not working.
Please tell me what could be the issue.
Drupal v7. There are no child elements in the menu.
Thanks in advance!

Answer 1

menu_attributes not an option?

Answer 2

into template

<?php
$menu = menu_tree('mymenu');
echo render($menu);
?>

in template.php

function mytheme_menu_link(array $variables) {
    $element = $variables['element'];
    $sub_menu = '';

    if ($element['#below']) {
        $sub_menu = drupal_render($element['#below']);
    }
    $element['#attributes']['class'][] = 'footer-nav__item';
    $output = l($element['#title'], $element['#href'], $element['#localized_options']);
    return '<li' . drupal_attributes($element['#attributes']) . '>' . $output . $sub_menu . "</li>\n";
}

don't forget to change mymenu and mytheme