How to create a multi-select of entries created with Ext JS (model and ext js entries are created)

Hello, I have created a plugin which gives an opportunity to create specific entries. I have created the php model, controller, implemented the listing and detail window with ext js, etc. Now I want to know how can I create a shopping world element which will select specific entries of the ones which are created, just like the manufacturer slider, which can select specific manufacturers, I want to be able to select my entries.