Your posts on here will be much easier to read if you concentrate on certain aspects of written English. You will get more responses if you:
1) Capitalise the first word of every sentence.
2) Use articles.
3) "Cannot" is all one word.
4) Please don't use textspeak (plz, thx, u etc) - use complete words.
As far as your question is concerned, you are right that "to live" would normally be followed by an adverb (as would any other verb). However, stylistically, there are a lot of phrases which don't follow that rule. They tend to be "slogan" style phrases.
Grammatically, they should be "Live intelligently", "Eat healthily" and "Buy cleverly/intelligently" but they've become recognised in this form instead. I suppose you could say, for example, that "Live in a smart way" has been abbreviated but even so "in a smart way" = "smartly/intelligently".
My only advice is that some things which don't follow normal grammatical structure are used every day and by many people. That does not mean they should be used by students or learners, especially in work that is to be submitted for marking.
Student or Learner