Hi,
In the application for immigrant visa (PR), the question is phrased as follows:
"Have you been convicted, or are you currently charged with, on trial for, or party to a crime or offence, or subject of any criminal proceedings in any current?"
Obviously in your case, the answer is NO. Therefore, it has no impact on any future PR application on your part.
Go see this link to check whether your acquittal will have an effect on your visitor visa application:
http://www.canadainternational.gc.ca/philippines/visas/visiting-visiter.aspx?lang=eng