Cron Job Script

I have a limitation with my hosting account that I am only able to run 3 cron jobs, however as my website grows I need to be able to add more cron jobs.

For example at the moment I have:

whmcspath/crons/domainsync.php
whmcspath/admin/cron.php
projectpath/tasks/frequently.php
projectpath/tasks/hourly.php
projectpath/tasks/daily.php

And I'll probably add to this over time. I need it to specify how often I run it i.e. every 10minutes, hourly and daily.

I need a script created so I have one cron job that is run through my hosting account that in turn runs all of the other cron jobs.