navigation.yml

oro_menu_config:
    items:
        hrm_tab:
            label: 'oro.hrm.menu.hrm_tab.label'
            uri: '#'
            extras:
                position: 100
                icon: icon-folder-open
        applicants:
            label: ''
            route: 'oro_hrm_applicant_index'
            extras:
                position: 200
            attributes:
                class: 'applicants'

    tree:
        application_menu:
            children:
                hrm_tab:
                    children:
                        applicants: ~