Use the category name instead of category slug in permalinks

Question

How to create a permalink structure which finish by:

/category-name/post-name/

Instead of:

/category-slug/post-name/

By default, Wordpress is offering %category% tag strucure as "A sanitized version of the category name (category slug field on New/Edit Category panel".

How can I use the category name instead of category slug in permalinks?

Answer 1

add_filter('rewrite_rules_array', 'category_name_rewrite_rule');
function category_name_rewrite_rule($rules) {
    $new_rules = array();
    $categories = get_categories();
    foreach ($categories as $category) {
        $cat_name = preg_replace('#\s+#', '-', $category->name);
        $new_rules['/'.$category->slug}.'/'] = '/'.url_encode($cat_name).'/';
    }
    return $new_rules + $rules;
}