There are a few options that may be available to you:
1. Attendant care expenses from a nursing home are eligible medical expenses. You are allowed to claim both your and your husband's medical expenses on your return.
2. The Canada Caregiver Amount. This income-tested benefit is available for family members who support infirm relatives.
3. Disability amount transfer. If your husband has a valid disability tax certificate on file with CRA and does not use all of the disability credit to lower his own income, the remainder can be transferred to you.
Here's a link from CRA for more information: https://www.canada.ca/en/revenue-agency/services/tax/individuals/segments/tax-credits-deductions-per...