WordPress adds tutorial codes for custom fields to categories and labels

 <? php 

 function boke8_net_add_category_field ( ) {

	 echo  '<div class="form-field">

 <label for="tag title">Customize the title</label>

 <input name="tag-title" id="tag-title" type="text" value="" size="40">

 <p>Please enter here for SEO Optimized title</ p>

 </div>' ;	

	 echo  '<div class="form-field">

 <label for="tag keywords">Custom keywords</label>

 <input name="tag-keywords" id="tag-keywords" type="text" value="" size="40">

 <p>Please enter keywords for SEO optimization here</ p>

 </div>' ;		  

	 echo  '<div class="form-field">

 <label for="tag description">User defined description</label>

 <textarea name="tag-description" id="tag-description" class="large-text" rows="5" cols="50"></textarea>

 <p>Please enter keywords for SEO optimization here</ p>

 </div>' ;		  

 }

 function boke8_net_edit_category_field ( $tag ) {

	 echo  '<tr class="form-field">

 <th scope="row"><label for="tag title">Custom title</label></th>

 <td>

 <p><input name="tag-title" id="tag-title" type="text" value="' ;

				 echo get_option ( '_category_title' . $tag -> term_id ) . '" size="40"/></p>

 <p class="description">Please enter the title for SEO optimization here</ p>

 </td>

 </tr>' ;

	 echo  '<tr class="form-field">

 <th scope="row"><label for="tag keywords">user-defined keywords</label></th>

 <td>

 <p><input name="tag-keywords" id="tag-keywords" type="text" value="' ;

				 echo get_option ( '_category_keywords' . $tag -> term_id ) . '" size="40"/></p>

 <p class="cat url">Please enter keywords for SEO optimization here</ p>

 </td>

 </tr>' ;	

	 echo  '<tr class="form-field">

 <th scope="row"><label for="tag description">User defined description</label></th>

 <td>

 <p><textarea name="tag-description" id="tag-description" class="large-text" rows="5" cols="50">' . get_option ( '_category_description' . $tag -> term_id ) . '</textarea></p>

 <p class="cat url">Please enter a description for SEO optimization here</ p>

 </td>

 </tr>' ;		

 }

 function boke8_net_taxonomy_metadate ( $term_id ) {

	 if ( isset ( $_POST [ 'tag-title' ] )  &&  isset ( $_POST [ 'tag-keywords' ] )  &&  isset ( $_POST [ 'tag-description' ] ) ) {

		 if ( ! current_user_can ( 'manage_categories' ) ) {

			 return  $term_id ;

		 }

		 $title_key  =  '_category_title' . $term_id ;  //The key option is cat-tel-1 type

		 $title_value  =  $_POST [ 'tag-title' ] ;	 // value

		 $word_key  =  '_category_keywords' . $term_id ;

		 $word_value  =  $_POST [ 'tag-keywords' ] ;

		 $desc_key  =  '_category_description' . $term_id ;

		 $desc_value  =  $_POST [ 'tag-description' ] ;		

 update_option (  $title_key ,  $title_value  ) ; 

 update_option (  $word_key ,  $word_value  ) ;

 update_option (  $desc_key ,  $desc_value  ) ;

	 }

 } 

 add_action ( 'category_add_form_fields' , 'boke8_net_add_category_field' , ten , two ) ;

 add_action ( 'category_edit_form_fields' , 'boke8_net_edit_category_field' , ten , two ) ;

 add_action ( 'created_category' , 'boke8_net_taxonomy_metadate' , ten , one ) ;

 add_action ( 'edited_category' , 'boke8_net_taxonomy_metadate' , ten , one ) ;

 add_action (  'post_tag_add_form_fields' ,  'boke8_net_add_category_field' , ten , two ) ;  

 add_action (  'post_tag_edit_form_fields' ,  'boke8_net_edit_category_field' , ten , two ) ;  

 add_action (  'edited_post_tag' ,  'boke8_net_taxonomy_metadate' , ten , one ) ;  

 add_action (  'create_post_tag' ,  'boke8_net_taxonomy_metadate' , ten , one ) ;

 ?>

 echo get_option ( '_category_title' . get_queried_object_id ( ) ) ;

 echo get_option ( '_category_keywords' . get_queried_object_id ( ) ) ;

 echo get_option ( '_category_description' . get_queried_object_id ( ) ) ;