comicpress-theme-core/options.php

<?php

class ComicPressOptionsAdmin {
  function render_admin() {
    $nonce = wp_create_nonce('comicpress');

    include(dirname(__FILE__) . '/partials/options-admin.inc');	
  }

  function get_root_categories() {
    $root_categories = array();
    foreach (get_all_category_ids() as $id) {
      $category = get_category($id);
      if (!empty($category)) {
        if ($category->parent == 0) {
          $root_categories[] = $category;
        }
      }
    }
    return $root_categories;
  }

  function create_category_options($categories, $selected_id) {
    $output = array();
    if (is_array($categories)) {
      $final_categories = array();
      foreach ($categories as $category) {
        if (is_numeric($category)) {
          $result = get_category($category);
          if (!is_a($result, "WP_Error")) {
            $final_categories[] = $result;
          }
        }
        if (is_object($category)) {
          $final_categories[] = $category;
        }
      }

      foreach ($final_categories as $category) {
        $output[] = '<option value="' . $category->term_id . '"' . ($category->term_id == $selected_id ? ' selected="selected"' : '') . '>' . $category->name . '</option>';
      }
    }
    return implode("\n", $output);
  }
}

$comicpress_options_admin = new ComicPressOptionsAdmin();

function __comicpress_add_options_admin() {
  global $comicpress_options_admin;
  add_theme_page(__("ComicPress Options", 'comicpress'), __('ComicPress Options', 'comicpress'), 'edit_themes', basename(__FILE__), array($comicpress_options_admin, 'render_admin'));
}

?>