You need to create a batch of NFC tags containing individual urls? This is a tedious task with most other NFC apps. NFC Batch Writer helps you with this task: Simply add your target urls to a Google spreadsheet (or textfile on your webserver). The app imports your tag list, then you can simply move your phone from one tag to the next and the urls get writen one after the other.
You can also write-protect the NFC tags.
Hint: This app was developed exactly for this use case. It is not a general-purpose NFC app.