alert(('/blog/74-623-zapisi-o-sobakah-porodi').split('/').pop().replace(/\d+-\d+-/,'')); alert(('/blog/74-623-zapisi-o-sobakah-porodi').split(/\d+-\d+-/).pop());
newStr = str.replace(/\/\w+\/\d+-\d+-(.+)/, '$1');
alert('/blog/74-623-zapisi-o-sobakah-porodi'.replace(/(.+)/, '...'));