Добавляем кастомные метабоксы для стилей и скриптов под постами и страницами (найдено было тут):
add_action('admin_menu', 'custom_css_hooks'); add_action('save_post', 'save_custom_css'); add_action('wp_head','insert_custom_css'); function custom_css_hooks() { add_meta_box('custom_css', 'Custom CSS', 'custom_css_input', 'post', 'normal', 'high'); add_meta_box('custom_css', 'Custom CSS', 'custom_css_input', 'page', 'normal', 'high'); } function custom_css_input() { global $post; echo '<input type="hidden" name="custom_css_noncename" id="custom_css_noncename" value="'.wp_create_nonce('custom-css').'" />'; echo '<textarea name="custom_css" id="custom_css" rows="5" cols="30" style="width:100%;">'.get_post_meta($post->ID,'_custom_css',true).'</textarea>'; } function save_custom_css($post_id) { if (!wp_verify_nonce($_POST['custom_css_noncename'], 'custom-css')) return $post_id; if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return $post_id; $custom_css = $_POST['custom_css']; update_post_meta($post_id, '_custom_css', $custom_css); } function insert_custom_css() { if (is_page() || is_single()) { if (have_posts()) : while (have_posts()) : the_post(); echo '<style type="text/css">'.get_post_meta(get_the_ID(), '_custom_css', true).'</style>'; endwhile; endif; rewind_posts(); } } add_action('admin_menu', 'custom_js_hooks'); add_action('save_post', 'save_custom_js'); add_action('wp_footer','insert_custom_js'); function custom_js_hooks() { add_meta_box('custom_js', 'Custom JS', 'custom_js_input', 'post', 'normal', 'high'); add_meta_box('custom_js', 'Custom JS', 'custom_js_input', 'page', 'normal', 'high'); } function custom_js_input() { global $post; echo '<input type="hidden" name="custom_js_noncename" id="custom_js_noncename" value="'.wp_create_nonce('custom-js').'" />'; echo '<textarea name="custom_js" id="custom_js" rows="5" cols="30" style="width:100%;">'.get_post_meta($post->ID,'_custom_js',true).'</textarea>'; } function save_custom_js($post_id) { if (!wp_verify_nonce($_POST['custom_js_noncename'], 'custom-js')) return $post_id; if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return $post_id; $custom_js = $_POST['custom_js']; update_post_meta($post_id, '_custom_js', $custom_js); } function insert_custom_js() { if (is_page() || is_single()) { if (have_posts()) : while (have_posts()) : the_post(); echo '<script>'.get_post_meta(get_the_ID(), '_custom_js', true).'</script>'; endwhile; endif; rewind_posts(); } }