Get Editor capanilities to manage users

functions.php

/*
 * Let Editors manage users, and run this only once.
 */
function isa_editor_manage_users() {
 
    if ( get_option( 'isa_add_cap_editor_once' ) != 'done' ) {
     
        // let editor manage users
 
        $edit_editor = get_role('editor'); // Get the user role
        $edit_editor->add_cap('edit_users');
        $edit_editor->add_cap('list_users');
        $edit_editor->add_cap('promote_users');
        $edit_editor->add_cap('create_users');
        $edit_editor->add_cap('add_users');
        $edit_editor->add_cap('delete_users');
 
        update_option( 'isa_add_cap_editor_once', 'done' );
    }
 
}
add_action( 'init', 'isa_editor_manage_users' );

//prevent editor from deleting, editing, or creating an administrator
// only needed if the editor was given right to edit users
 
class ISA_User_Caps {
 
  // Add our filters
  function ISA_User_Caps(){
    add_filter( 'editable_roles', array(&$this, 'editable_roles'));
    add_filter( 'map_meta_cap', array(&$this, 'map_meta_cap'),10,4);
  }
  // Remove 'Administrator' from the list of roles if the current user is not an admin
  function editable_roles( $roles ){
    if( isset( $roles['administrator'] ) && !current_user_can('administrator') ){
      unset( $roles['administrator']);
    }
    return $roles;
  }
  // If someone is trying to edit or delete an
  // admin and that user isn't an admin, don't allow it
  function map_meta_cap( $caps, $cap, $user_id, $args ){
    switch( $cap ){
        case 'edit_user':
        case 'remove_user':
        case 'promote_user':
            if( isset($args[0]) && $args[0] == $user_id )
                break;
            elseif( !isset($args[0]) )
                $caps[] = 'do_not_allow';
            $other = new WP_User( absint($args[0]) );
            if( $other->has_cap( 'administrator' ) ){
                if(!current_user_can('administrator')){
                    $caps[] = 'do_not_allow';
                }
            }
            break;
        case 'delete_user':
        case 'delete_users':
            if( !isset($args[0]) )
                break;
            $other = new WP_User( absint($args[0]) );
            if( $other->has_cap( 'administrator' ) ){
                if(!current_user_can('administrator')){
                    $caps[] = 'do_not_allow';
                }
            }
            break;
        default:
            break;
    }
    return $caps;
  }
 
}
 
$isa_user_caps = new ISA_User_Caps();

// hide admin from user list
add_action('pre_user_query','isa_pre_user_query');
function isa_pre_user_query($user_search) {
  $user = wp_get_current_user();
  if ($user->ID!=1) { // Is not administrator, remove administrator
    global $wpdb;
    $user_search->query_where = str_replace('WHERE 1=1',
      "WHERE 1=1 AND {$wpdb->users}.ID<>1",$user_search->query_where);
  }
}