You can try this, Based on my understanding.
$('.read-more').click(function () {
$(this).closest('.member-content').next('.contentDiv').find('.myContent').show();
$(this).hide();
});
$('.close-more').click(function () {
$(this).closest('.contentDiv').prev('.member-content').find('.read-more').show();
$(this).closest('.myContent').hide();
});