Laboratory courses are an important part of the undergraduate physics curriculum. During physics labs, students can engage in authentic, hands-on experimental practices, which can prepare them for graduate school, research laboratories, and jobs in industry. Because of the COVID-19 pandemic in Spring 2020, colleges and universities across the world rapidly transitioned to teaching labs remotely. In this work, we report results from a survey of physics lab instructors on how they adapted their courses in the transition to emergency remote teaching. We identified three common themes in the instructors' responses: (i) using a variety of simulation tools, (ii) changing learning goals of the courses to be more concept focused, and (iii) reducing group work due to equity and technological concerns. We discuss the common challenges and successes reported by instructors, which leads to themes and lessons that can impact future remote and in-person instruction.