Look at wget, then put something like:
wget http://host/page.php 2>/dev/null
in a file and schedule that file. Don't forget to set the file to be executable.
This will run the script but not save any returned results from the "browser" output. Remove the 2>/dev/null and it'll save the file in the cron dir each time which is not probably what you want.
Wget has many very useful functions so make sure to check the man page.