Life is a series of moments. Every beautiful moment of life stays in the heart as the sweetest memory forever. The memories you will hold close to your heart for the years to come. We, at Popley Make Every Occasion A Celebration.
And then came this;
Maybe something like that would have done the trick;
Make all those moments your sweetest memories.
Turn all those moments into your sweetest memories.
By the way if you're going to stick to your original sentence, then it should be written like this;
Make Every Occasion a Celebration.
Every beautiful moment of life remains a beautiful memory, and we at Popley want to make every special moment of your life a celebration. Here’s an exclusive offer to ensure that you will hold these memories close to your heart throughout the years to come.
Every special moment is a treasure to be cherished
According to the harmony between the slogan and the ad-text, this one is better.