put the code bellow into functions.php :
class Password_Reset_Removed
{
function __construct()
{
add_filter( 'show_password_fields', array( $this, 'disable' ) );
add_filter( 'allow_password_reset', array( $this, 'disable' ) );
add_filter( 'gettext', array( $this, 'remove' ) );
}
function disable()
{
if ( is_admin() ) {
$userdata = wp_get_current_user();
$user = new WP_User($userdata->ID);
if ( !empty( $user->roles ) && is_array( $user->roles ) && $user->roles[0] == 'administrator' )
return true;
}
return false;
}
function remove($text)
{
return str_replace( array('Lost your password?', 'Lost your password'), '', trim($text, '?') );
}
}
$pass_reset_removed = new Password_Reset_Removed();
add the following to your themes functions.php file to disable register:
add_action( 'login_head', 'hide_login_nav' );
function hide_login_nav()
{
?><style>#nav{display:none}</style><?php
}