(CODING) How can i make this happen?

how can i make a popup box that has a link in it but is a different thing than the link? like in HTML you go and put in a link and have a different name than the site such as a click box can send u to http://www.yahoo.com/ but the box will say Yahoo!, how can i do that in a popup box?(CODING) How can i make this happen?
%26lt;a href=';url';%26gt;Text to display%26lt;/a%26gt;

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