GIS (Leaflet or Openlayers): Map implementation with Leaflet or Openlayers for Laravel and Android

We have a map application based on Laravel website and it's Android application. Both Laravel and Android applications are based on Google Map to display our content (like stores) at particular locations. We want to use open source libraries, like Leaflet or Openlayers. We need you to rewrite this part and display our stores on the webpage and App screen. In our Laravel project, there're two or three files related to this. In our Android app, there're one main file related to this. So we need you to re-write these codes so that it's based on Leaflet or Openlayers. If you have existing open-source code, then it should be quick implementation.