/core/fields/tab.php

<?php 
 
class acf_field_tab extends acf_field 
{ 
   
  /** 
  *  __construct 
  * 
  *  Set name / label needed for actions / filters 
  * 
  *  @since    3.6 
  *  @date    23/01/13 
  */ 
   
  function __construct() 
  { 
      // vars 
      $this->name = 'tab'; 
      $this->label = __("Tab", 'acf'); 
      $this->category = __("Layout", 'acf'); 
       
       
      // do not delete! 
      parent::__construct(); 
  } 
   
   
  /** 
  *  create_field() 
  * 
  *  Create the HTML interface for your field 
  * 
  *  @param    $field - an array holding all the field's data 
  * 
  *  @type    action 
  *  @since    3.6 
  *  @date    23/01/13 
  */ 
   
  function create_field( $field ) 
  { 
      echo '<div class="acf-tab">' . $field['label'] . '</div>'; 
  } 
   
   
   
  /** 
  *  create_options() 
  * 
  *  Create extra options for your field. This is rendered when editing a field. 
  *  The value of $field['name'] can be used (like bellow) to save extra data to the $field 
  * 
  *  @param    $field    - an array holding all the field's data 
  * 
  *  @type    action 
  *  @since    3.6 
  *  @date    23/01/13 
  */ 
   
  function create_options( $field ) 
  { 
      ?> 
      <tr class="field_option field_option_<?php echo $this->name; ?>"> 
          <td class="label"> 
              <label><?php _e("Instructions", 'acf'); ?></label> 
          </td> 
          <td> 
              <p><?php _e("Use \"Tab Fields\" to better organize your edit screen by grouping your fields together under separate tab headings.", 'acf'); ?></p> 
              <p><?php _e("All the fields following this \"tab field\" (or until another \"tab field\" is defined) will be grouped together.", 'acf'); ?></p> 
              <p><?php _e("Use multiple tabs to divide your fields into sections.", 'acf'); ?></p> 
          </td> 
      </tr> 
      <?php 
       
  } 
   
} 
 
new acf_field_tab(); 
 
?>