How to use hook to set routing in php and CI framework?

Please tell me how to use hooks to set routes in CI. During the project process, some URLs need to be taken out from the database instead of being predefined in routes.php. Can I use the pre_system mount point before routing? Just configured? But the pre_system mount point seems not to be able to use super objects!

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Please tell me how to use hooks to set routes in CI. During the project process, some URLs need to be taken out from the database instead of being predefined in routes.php. Can I use the pre_system mount point before routing? Just configured? But the pre_system mount point seems not to be able to use super objects!