我已经安装了主题我的登录插件，我想更改password\\u fields功能：这是自定义密码的代码。插件的php：

     /**
 * Loads the module
 *
 * @since 6.0
 * @access protected
 */
protected function load() {
    add_action( \'register_form\',       array( &$this, \'password_fields\' ) );
    add_filter( \'registration_errors\', array( &$this, \'password_errors\' ) );
    add_filter( \'random_password\',     array( &$this, \'set_password\'    ) );

    add_action( \'signup_extra_fields\',       array( &$this, \'ms_password_fields\'       ) );
    add_action( \'signup_hidden_fields\',      array( &$this, \'ms_hidden_password_field\' ) );
    add_filter( \'wpmu_validate_user_signup\', array( &$this, \'ms_password_errors\'       ) );
    add_filter( \'add_signup_meta\',           array( &$this, \'ms_save_password\'         ) );

    add_action( \'tml_new_user_registered\', array( &$this, \'remove_default_password_nag\' ) );
    add_action( \'approve_user\',            array( &$this, \'remove_default_password_nag\' ) );

    add_filter( \'tml_register_passmail_template_message\', array( &$this, \'register_passmail_template_message\' ) );
    add_action( \'tml_request\',                            array( &$this, \'action_messages\'                    ) );

    add_filter( \'registration_redirect\', array( &$this, \'registration_redirect\' ) );
}

/**
 * Outputs password fields to registration form
 *
 * Callback for "register_form" hook in file "register-form.php", included by Theme_My_Login_Template::display()
 *
 * @see Theme_My_Login::display()
 * @since 6.0
 * @access public
 */
public function password_fields() {
    $template =& Theme_My_Login::get_object()->get_active_instance();
    ?>
    <p><label for="pass1<?php $template->the_instance(); ?>"><?php _e( \'Password\' ); ?></label>
    <input autocomplete="off" name="pass1" id="pass1<?php $template->the_instance(); ?>" class="input" size="20" value="" type="password" /></p>
    <p><label for="pass2<?php $template->the_instance(); ?>"><?php _e( \'Confirm Password\', \'theme-my-login\' ); ?></label>
    <input autocomplete="off" name="pass2" id="pass2<?php $template->the_instance(); ?>" class="input" size="20" value="" type="password" /></p>
    <?php
}

     function init_wp() {

// remove parent theme\'s header content action
remove_action(\'register_form\', \'password_fields\');

// add child theme\'s header content action
add_action(\'register_form\', \'cust_password_fields\');

     }
     add_action(\'init\', \'init_wp\');

function cust_password_fields(){

}