Wordpress Filter Categories -


how sub categories id ? catrgories , subcatrgories like

2013    april 10    april  9    april  8     march  10    march  9 2012   june 10   may 6       may 5 cast group party

how subcategory id's of month? need pagination show page links site.com/catrgory/catrgory-slug/issue/{year}/{month}/{day}. need show pagination links subcategory pages. list post of particular subcategory.

i using rewrite url 

add_action('generate_rewrite_rules', 'past_issue_rewrite_rules'); function past_issue_rewrite_rules( $wp_rewrite ) {      // handles paged/pagination requests     $new_rules = array('category/catrgory-slug/issue/(.+)/(.+)/(.+)/' => '?year='.$wp_rewrite->preg_index(1).'&month='.$wp_rewrite->preg_index(2).'&day='.$wp_rewrite->preg_index(3));      // add new rewrite rule top of global rules array     $wp_rewrite->rules = $new_rules + $wp_rewrite->rules; }

i tired , working

$root_categories = get_categories( array('parent' => 0,'hide_empty ' => 1, 'order' => 'desc')); $categories = array(); if(empty($root_categories)){ return $categories;} foreach($root_categories $category){      if(preg_match('/\d{4}$/',$category->name, $matches)) {         $subcategories = get_categories('child_of='.$category->cat_id.'&hide_empty=1&order=desc');         if(!empty($subcategories)) {             foreach($subcategories $subcatgory) {             }         }     } }

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