You can add hyperlinks into your text templates if you so wish.
To do this first start by going to the admin section and then finding the text message set up area and then clicking on text message templates.
From here you can either create a new template at the top of the screen or edit existing ones by clicking the pencil icon next to them.
Place your cursor where you want the hyperlink to be added into the text massage and either type in the URL or copy and paste it in.
Save your template by hitting the save link and then this will have a hyperlink added to your text message.