You can view the Demo of Gentelella Theme here: https://colorlib.com/polygon/gentelella/index.html

You can install using composer.

composer require backstageel/cakephp-gentelella-theme

// config/bootstrap.php
Plugin::load('Gentelella', ['bootstrap' => true, 'routes' => true]);

// src/Controller/AppController.php
public function beforeRender(Event $event)
{
    $this->viewBuilder()->theme('Gentelella');
}

This Theme Uses the BootstrapUI Plugin for CakePHP to create Bootstrap Forms. The Plugin will be installed automatically if you use composer.

Follow BootstrapUI settings to configure other aspects of the Plugin.

https://github.com/FriendsOfCake/bootstrap-ui

// src/Controller/AppController.php
use Cake\Core\Configure;
public function beforeRender(Event $event)
{
    // ...
    $this->set('theme', Configure::read('Theme'));
}

// To customize configuration paste it at end of file config/bootstrap.php
Configure::write('Theme', [
    'title' => 'Gentelella',
    'logo' => [
        'mini' => '<b>G</b>T',
        'large' => '<b>Gentelella</b>Theme'
    ],
    'login' => [
        'show_remember' => true,
        'show_register' => true,
        'show_social' => true
    ]
]);

Don't forget to Symlink Assets to improve performance

bin/cake plugin assets symlink

Replace the files according to the image.

1. src/Template/Element/nav-top.ctp
2. src/Template/Element/aside-main-sidebar.ctp
3. src/Template/Element/aside/user-panel.ctp
4. src/Template/Element/aside/form.ctp
5. src/Template/Element/aside/sidebar-menu.ctp
6. src/Template/Element/aside-control-sidebar.ctp
7. src/Template/Element/footer.ctp

Added link to default page of CakePHP.

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request