There are multiple ways to add a link inside a bubble.
To insert a link on the clicktap
In the Insert Link dialog, enter a link and link description (optional).
Alternatively, you can add a link by typing in a URL. URLs beginning with http:// will automatically be converted into clickable links after you exit the bubble.
To display your link as text, instead of the link web address, add your desired text in square brackets immediately following the link. For example: http://bubbl.us[Cool Web Site] will display as Cool Web Site. The description surrounded with square brackets will become a clickable link after you exit the bubble.