At the bottom of each of your Hosted Campaign Sites, by default, there will be a button to "Check Out Our Other Campaigns." This will open a page that automatically lists all campaigns that are Active in your Flipcause Dashboard.
You can remove campaigns from showing up in this list by moving them from Active to Drafts (this will also remove them from any Campaign Menu they were added to and make them not available to select in the Integration Center).
You can also remove this button altogether. To remove the button from your campaign site, go to "Edit this Campaign" for the campaign in question, and go to the Hosted Site Appearance tab > Footer.
Here, you can toggle "Other Campaigns Button" to Off and it will remove this from your campaign.
Be sure to click Save!
You can turn off this setting for all future campaigns by going to Organization Profile > Default Campaign Settings > Hosted Campaign Sites. At the bottom of this will be a Footer area where you can likewise toggle off this button.