Bootstrap.php
protected function initNavigation()
    {
        Yii::$app->params['nav']['wavecms_dashboard'] = [
            'label' => FontAwesome::icon('home') . Yii::t('wavecms/main', 'Dashboard'),
            'url' => ['/'],
            'position' => 500
        ];

        Yii::$app->params['nav']['wavecms_user'] = [
            'label' => FontAwesome::icon('users') . Yii::t('wavecms/user', 'Users'),
            'url' => 'javascript: ;',
            'options' => [
                'class' => 'drop-down'
            ],
            'permission' => 'wavecms-user',
            'position' => 9000,
            'items' => [
                [
                    'label' => FontAwesome::icon('user') . Yii::t('wavecms/user', 'List of users'),
                    'url' => ['/wavecms/user/index']
                ],
                [
                    'label' => FontAwesome::icon('key') . Yii::t('wavecms/user', 'Roles'),
                    'url' => ['/wavecms/role/index']
                ],
            ]
        ];

        Yii::$app->params['nav']['wavecms_settings'] = [
            'label' => FontAwesome::icon('cog') . Yii::t('wavecms/main', 'Settings'),
            'url' => 'javascript: ;',
            'options' => [
                'class' => 'drop-down'
            ],
            'permission' => 'wavecms-settings',
            'position' => 10000,
            'items' => [
                [
                    'label' => FontAwesome::icon('flag') . Yii::t('wavecms/main', 'Translations'),
                    'url' => ['/wavecms/translation/index']
                ],
                [
                    'label' => FontAwesome::icon('database') . Yii::t('wavecms/main', 'Cache'),
                    'url' => ['/wavecms/settings/cache']
                ]
            ]
        ];
    }
protected function initNavigation()
    {
        Yii::$app->params['nav']['wavecms_dashboard'] = [
            'label' => FontAwesome::icon('home') . Yii::t('wavecms/main', 'Dashboard'),
            'url' => ['/'],
            'position' => 500
        ];

        Yii::$app->params['nav']['wavecms_user'] = [
            'label' => FontAwesome::icon('users') . Yii::t('wavecms/user', 'Users'),
            'url' => 'javascript: ;',
            'options' => [
                'class' => 'drop-down'
            ],
            'permission' => 'wavecms-user',
            'position' => 9000,
            'items' => [
                [
                    'label' => FontAwesome::icon('user') . Yii::t('wavecms/user', 'List of users'),
                    'url' => ['/wavecms/user/index']
                ],
                [
                    'label' => FontAwesome::icon('key') . Yii::t('wavecms/user', 'Roles'),
                    'url' => ['/wavecms/role/index']
                ],
            ]
        ];

        Yii::$app->params['nav']['wavecms_settings'] = [
            'label' => FontAwesome::icon('cog') . Yii::t('wavecms/main', 'Settings'),
            'url' => 'javascript: ;',
            'options' => [
                'class' => 'drop-down'
            ],
            'permission' => 'wavecms-settings',
            'position' => 10000,
            'items' => [
                [
                    'label' => FontAwesome::icon('flag') . Yii::t('wavecms/main', 'Translations'),
                    'url' => ['/wavecms/translation/index']
                ],
                [
                    'label' => FontAwesome::icon('database') . Yii::t('wavecms/main', 'Cache'),
                    'url' => ['/wavecms/settings/cache']
                ]
            ]
        ];
    }
Init left navigation