At present you can not specify a hyperlink within the description field/ text field of a requirement.
This issue is already as RMI-1990.
However, for the time being, you can specify links to external documents/pages within the "Attachments" column.
A detailed explanation for Requirements attributes is available here : http://docs.optimizory.com/display/rmsis/Requirement+Attributes
Note :
- In order to help us to prioritise the issues/ feature requests, if this issue is not tracked against your ID in our CRM, please let us know by sending a mail to <support@optimizory.com>
  - Once you inform us, this issue will be tracked against your ID.
  - Subsequently, we will keep you abreast of the development of this issue and will inform you once the fix for this issue is available.

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