This can be achieved with jQuery .trigger() event.

jQuery('#id-of-your-phrase').click(function (e) { e.preventDefault(); jQuery('#id-or-class-of-first-image-YouCanAlsoUse-first-child').trigger('click'); });

This code will open the colorbox from First Image (the Big).

Thanks

This can be achieved with jQuery .trigger() event.

jQuery('#id-of-your-phrase').click(function (e) {
 e.preventDefault();
 jQuery('#id-or-class-of-first-image-YouCanAlsoUse-first-child').trigger('click');
});

This code will open the colorbox from First Image (the Big).